Malicious PDF — malware analysis report

Static analysis result for SHA-256 8018329ff22e3158…

MALICIOUS

PDF

67.0 KB Created: 2020-12-01 12:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4da3bbe7466934439f5654bac70f8cd3 SHA-1: 69a797f24ae54c93130739cc952e2e7f5e24dd83 SHA-256: 8018329ff22e3158e3ebb7550c9424ef0ab9d5d2eab41688556b3a3c43d3d586
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or lead users to harmful content, likely through embedded JavaScript or by leveraging the external links.

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=anatomy+drawing+school+human+and+animal+pdf PDF link annotation
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/74025b5babe.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/4198695.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/xuwamanuril.pdfIn PDF document text
    • https://levibuzoj.weebly.com/uploads/1/3/4/4/134444272/9380669.pdfIn PDF document text
    • https://moxatabik.weebly.com/uploads/1/3/4/8/134885740/d2bfc983f1fcc3b.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/4137171.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/semumexivoki.pdfIn PDF document text
    • https://zisogojevup.weebly.com/uploads/1/3/1/4/131453725/jomexurezugud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f27ea13a450babf44921/t/5fc1749b6457125654730e90/1606513820142/psychic_distance_writing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf99ab474932ca2675888/1606220186062/transformers_forged_to_fight_ios_cheats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a3df8cdb769c6d8dbbc/1606371902125/tewepizogitanipod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28db48787e87989768336/t/5fc609713f75b16643a3442e/1606814065983/vibika.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14748c89e1c4b8fc0f61a/t/5fc5588b5147b14804e4003f/1606768779504/6760070498.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 5752 bytes
SHA-256: a82f570df9ff86718271746a6dbc43b1b4974319c4643beb99d214893969d504
font_01_sfnt_off0000dba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA1 10448 bytes
SHA-256: 080fb82e3fc71d2115907d6833b2bcb6ec04d2ba5a88608ab484815e3e29befe

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