Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c7bd4699e29e0e…

MALICIOUS

PDF

114.0 KB Created: 2020-12-11 09:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 79621defe1924e10ae87fe870aee1bf4 SHA-1: d66a668d1fd845fd0508203b880d76645de32841 SHA-256: c7c7bd4699e29e0e9f1f163a83fa0badd526481af4e9558c730eb0bb2827d6b7
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=om+namo+narayanaya+sanskrit PDF link annotation
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/bibuvipediwaj.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/1981061.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/zuxadol/28501676736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67de3b9b-913d-4942-b9c3-13eb7aac379b/13997967448.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/47626375032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bba9363-04d9-46c7-832c-b3b987e329c4/plague_cell_canister.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ebe5f9866f3fd2d478df/t/5fc552ca9d793648403e164a/1606767306625/best_yugioh_structure_deck_2020_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5b1736-cb94-4005-aa4e-b793aef00948/half_life_formula_algebra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b43c137-5130-492c-be96-2934ef906e8d/mebilenonojufotowizopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb434c3-108e-44f6-bb1a-c691f25b923f/jovitaworomejafarovikejof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdddd03e-2a2e-4217-9252-bb6f3046c8b9/cassadaga_best_psychic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277d4281-190b-4173-b6ca-7ddaeaa47810/wikonaxuxojejopelaroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb882ea-9d99-4b80-89fa-98f62f7f4c74/48269771913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fd592f-f5d2-429d-b661-0fac6faa6f3e/data_mining_concepts_and_techniques.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000126b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x126B0 3776 bytes
SHA-256: c2e55a0e78314be5aa2035ee16a626243a59864fb2099698e64be20ff324245a
stream_009_off00017bf1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17BF1 25088 bytes
SHA-256: 9f594a35911cdfc89bebda5af7c9190dca50bad87f01e27cfd02d1dd100b24a9
font_00_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 7024 bytes
SHA-256: 713f4df90c5921ea52a48cd996caef13cb9918a3f1fead2f5ea685a38d07a5af
font_01_sfnt_off000115c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 4992 bytes
SHA-256: 1296bc5481b74709ab198efa927ed5c24aaaab2eb0cfb42d6a5ceabdd7af820f
font_03_sfnt_off000134e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E6 10176 bytes
SHA-256: 24f2e7a7a30a2ea4d60c7e435c07b564dac00d759f58a80ab3fec8a2c352b0ad
font_04_sfnt_off00014a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7E 3740 bytes
SHA-256: 380998d1091fdc20b7f1c1aeba8d78f77d4373c296f83289b97c927f51825d1c
font_05_sfnt_off000155f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F8 11836 bytes
SHA-256: a194f210a129eb19addbd7f9b79a0e05d34ace527f91f217424b8ef2142b212f
font_07_sfnt_off0001a8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8E4 4076 bytes
SHA-256: 16089a2fb13c29d69e5f12efd2cb9d195f69d7637cb0452eeb3e4a53f6ce48e7