Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e1847552afec6a…

MALICIOUS

PDF

111.2 KB Created: 2020-11-13 17:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 61f3957878aded869c219a625902514f SHA-1: 2d22013f4f21b79ea90ce0d73124f03ae659409d SHA-256: 24e1847552afec6a0479fc83876a9b2cdae58b1f5083f361471368465f5842d1
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?utm_term=main+prem+ki+diwani+hoon+english+subtitles In PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/1195108.pdfIn PDF document text
    • https://liwujozixo.weebly.com/uploads/1/3/4/4/134497145/valonog.pdfIn PDF document text
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/zofoba_kupebek.pdfIn PDF document text
    • https://gulijigomun.weebly.com/uploads/1/3/4/3/134350957/xapepir.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/7268132.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sample_complaint_letter_to_school_district.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072b2e39-258c-4eb8-8191-9d18ed24b876/weresezel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75b996f-c3fb-4f90-b80d-2379bfff45ec/linobejasemevasopafipivo.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/tejakajuzekugepufugel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900cd0cb-a2ff-42d3-bbb3-46ac4e1b6636/example_of_convergent_plate_boundary_on_earth.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 14

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC565 7916 bytes
SHA-256: 4fca73d47fa94a6ad668c0f4434483fdc2f54e6be5ae77a011c3735f5dfefd3b
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 3120 bytes
SHA-256: 4925a81319bbd9efa0dcb9b7c66fccd1fd8c2b9f5e9916edfa1d670e4d491518
font_02_sfnt_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 5676 bytes
SHA-256: 131401c915e3e6c5878698c3375ea8d7eb274a7e9afbd2c2e8c38c3914d75c61
font_03_sfnt_off0000f83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_04_sfnt_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 4140 bytes
SHA-256: 7073f777ec002e82a856420936458262fa3cc3b4ee0437ed56f01fa51c4379d2
font_05_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 3048 bytes
SHA-256: 2f58f42410b60611991c12283e964e03297a95500ca09b14f4d605296bc50bc4
font_06_sfnt_off00011c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6A 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_07_sfnt_off00012722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12722 2604 bytes
SHA-256: 0e4b190990c22158f359a0de2485c61736e93a484cfb226f63bccb9bc1da1b2f
font_08_sfnt_off000131fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FA 3840 bytes
SHA-256: 5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872
font_09_sfnt_off00014008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14008 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_10_sfnt_off000149dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149DD 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_11_sfnt_off00015787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15787 12176 bytes
SHA-256: 709dd8205973c9efac40e60b4d747ad65384df646858a5d69b8228e2a0c2d7f6
font_12_sfnt_off00017fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FD2 17616 bytes
SHA-256: ffa91a020b33267f23bc08862b19c46c9116300364dfd89ea8839083220a2f22
font_13_sfnt_off00019aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AFF 3536 bytes
SHA-256: 7260850907c932567cbfd34933d3cabda316f162d2897651222b22ae0a4cbd12