Malicious PDF — malware analysis report

Static analysis result for SHA-256 e346530343fa3228…

MALICIOUS

PDF

64.9 KB Created: 2020-12-19 00:34:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dad63fc8410f87276c24a633ab9a264a SHA-1: 1963877c8ceb3088bd2c8c22293f5846c18a63f0 SHA-256: e346530343fa32282c1ee4a60223c400dca2004f4ea9a6fa5299b21003e62c05
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafffi.ru/123?utm_term=folding+hitch+cargo+carrier+aluminum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fa488bd297ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450039/normal_5fda8533726a2.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/2088034.pdfIn PDF document text
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/68b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5fd1d5a27bc05.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/denepawudunudak_vofuxe.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/51e8e40a0113d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5f9471a48facb.pdfIn PDF document text
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/3633316.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/421aa.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/3eaea1d366db857.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/2290456.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://uploads.strikinglycdn.com/files/ab3f4b14-3c3e-476b-890d-c6d93983e074/sequential_tail_lights_mustang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e56b42-5ae8-44a1-b052-d943ae78aded/50492218229.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28838abaecd33182c940e/t/5fd0e65cd700412444ccbd2b/1607525981230/94805698430.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_off0000b5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FA 5012 bytes
SHA-256: 18a6f825d886ff2aad021002260ce3cab2ff768be83ee1dc33940d944b9bb61f
font_01_sfnt_off0000c6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CD 9840 bytes
SHA-256: 1f8256e655b5dc0f5b586fc9a5a78fe59f8833057a552d3dabda2506633488bd
font_02_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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