Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c7218d5ac989f6…

MALICIOUS

PDF

98.0 KB Created: 2020-11-27 12:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4250a5b8e045a20f6c3a575596d575cf SHA-1: dd73cc85412f125a9b29fa45f5d11bd4123947d8 SHA-256: 74c7218d5ac989f6acffa17116b301f76997d5e38b65cb0ca0d101af47809aea
214 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 0.9988

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
  • 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.
  • 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/123?utm_term=double+slit+diffraction+equation In PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/xufitakikili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fa1e13e0f22c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f9dcad88f453.pdfIn PDF document text
    • https://rewazuxaroro.weebly.com/uploads/1/3/4/3/134341361/5437650.pdfIn PDF document text
    • https://wowomake.weebly.com/uploads/1/3/4/6/134679477/mejujabozax_dadiragagi_buguvoguxukaf.pdfIn PDF document text
    • https://jezosodakadofa.weebly.com/uploads/1/3/4/3/134376186/logonem_sapisativede_pagufeto_mimasoxilovawu.pdfIn PDF document text
    • https://lujadogube.weebly.com/uploads/1/3/4/5/134522393/469c5ae4626c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f9a4e968d330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_5fb29253a9a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f9b71f8b2c09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/betimugi/battle_gear_3.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/analytical_chemistry_notes_for_bsc.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/38898194942.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/td_apps_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/fredo6_animator_v2._4b_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/psat_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/section_2_basketball_sectionals_2020.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00016803.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16803 6504 bytes
SHA-256: 86080a04ebd78c763bf26cb6368b1a231e23f9dd80b9fbcaa967b2208a50f933
font_00_sfnt_off0000dcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF8 7516 bytes
SHA-256: 696a81e84d583080892157656baf155fffa2942e40915b42bf972e5d124c7400
font_01_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 3148 bytes
SHA-256: a5b279f02d72b9a9f90a20f4d0ea34bc529691a211e0332fc8c824e18e1de280
font_02_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 5280 bytes
SHA-256: 509d7d7690726a712d1262085d41acefc6a1df10025bb3ba696b04b7bfb3ec47
font_03_sfnt_off00010d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7A 6280 bytes
SHA-256: 06620024b44374a83b8c1884f59b4bec392d08253552662d24842b9828248703
font_04_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 18044 bytes
SHA-256: 945794005c18d182f36f9f82e0712023c2b678d8a2fe34a60b96d7260222e7bf
font_05_sfnt_off00015164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15164 16516 bytes
SHA-256: 704e4f2605e0eaf15293b796e295765bb4019acaac2a5e915369f48b59420b95