Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e301c3c874176ef…

MALICIOUS

PDF

75.8 KB Created: 2021-01-15 06:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: db87934295e9664a06d56f9dfa6359a1 SHA-1: 8082af0b97fe3d61026254ae3822c9e70d653b46 SHA-256: 6e301c3c874176ef4634f506769e49fc295f458bf3d0d01793e62817a61c1e53
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafficel.ru/aws?utm_term=ba+2nd+year+date+sheet+2019+sol PDF link annotation
    • https://site-1178814.mozfiles.com/files/1178814/guvosatuzikewoxife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5fe52b9d50a09.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/vabanev.pdfIn PDF document text
    • https://site-1206985.mozfiles.com/files/1206985/2429088851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f9796a6a00af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5fd76c7046c0a.pdfIn PDF document text
    • https://site-1180410.mozfiles.com/files/1180410/97387560917.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/dokafopenivoziduf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rozebofukixus/dawn_of_war_ultimate_apocalypse_tyranids_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/resikerumejepomigenonupeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/computer_ki_full_form_ka_meaning.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDF 5288 bytes
SHA-256: 736a468657898164b2177cf7de8bdec52ee7f6ee5ac5ea403d027a21bff73934
font_01_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 10184 bytes
SHA-256: 443d0240f88a73f241bda85f41733ca552acb93fb841e0ab2d20756a4ed30be0
font_02_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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