Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e8ed9fd0768a01…

MALICIOUS

PDF

90.6 KB Created: 2020-12-24 18:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: acc6ac434dea38866d3990c7abaefd0c SHA-1: 075bdbbedb38404558c0f9e79b34369f685e796e SHA-256: c7e8ed9fd0768a01a8d01ffcb0ce7f2653a2caf649e34674284b06a8e20a9b83
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear textual lure. The presence of numerous external PDF links points towards an attempt to distribute further malicious content or redirect users to phishing pages.

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 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/aws?utm_term=cannonball+little+mix+sheet+music PDF link annotation
    • https://cdn.sqhk.co/munenetifu/hjDUkhe/sevediwawokijinometo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f9d69b42b258.pdfIn PDF document text
    • https://tinuvireredat.weebly.com/uploads/1/3/4/8/134864568/putatajot.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/0450b016628.pdfIn PDF document text
    • https://cdn.sqhk.co/mevojazix/dgijhjd/pba_card_texas.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/nepinipinuw.pdfIn PDF document text
    • https://cdn.sqhk.co/parapirer/5PKyjeM/farming_simulator_14_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/amggzfi/xuliwolisujedinuwimalibi.pdfIn PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/5982990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500430/normal_5fbc0e2780a18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_5fdba1548d6b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f873681c5ce7.pdfIn PDF document text
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/nozanuvososega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001277a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 5056 bytes
SHA-256: 3a6935d74325d6c1cbe389fd95ae1835f516be5ca3de96c7035d4da7fd9cb2cc
font_01_sfnt_off00013884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13884 10908 bytes
SHA-256: f579dfea3e6936b09cdff2c517c27acbc5a63464dd4ec17d6779eb57e8cfd0ee

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