Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0de1287d8b4bb01…

MALICIOUS

PDF

76.4 KB Created: 2021-03-05 00:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b428ef1e3d1e7e7377394cbabdb033b SHA-1: 2c09788048dfa97990b5d7874282d0f124ad95d2 SHA-256: c0de1287d8b4bb01784b7b035d3bb80bf2da955aa194b4b24e57485808eab416
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://xajibur.ru/123?utm_term=dirt+bike+track+medicine+hat PDF link annotation
    • http://nomegejevo.22web.org/gorumosizajixek.pdfIn PDF document text
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/e614ba60351904.pdfIn PDF document text
    • https://metogixum.weebly.com/uploads/1/3/0/7/130775033/77b0dadf2.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/lebatodugugog.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/zaxobupiwexakemab.pdfIn PDF document text
    • https://kujugozu.weebly.com/uploads/1/3/4/6/134660126/tezevasiwinevu.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/3c062e948c4ee2.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/936833.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/5490895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_067ae4eb55ad4411bb07df9ba24c3dc0.pdf?index=trueIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_a05884280d4f434ab577a224eea4328f.pdf?index=trueIn PDF document text
    • http://jivemewogipalen.rf.gd/verb_form_of_put.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_936439097c2b4f6496fb2d7f72ccfc2f.pdf?index=trueIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_c125924c02a143ad8df740830468feaa.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_f57b4969f8974498a1f5b01e24d652fc.pdf?index=trueIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_e9b9002d14c548988816f9dd14e8a3e7.pdf?index=trueIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_e3baf68b49ba49c39b1134084d7804b8.pdf?index=trueIn 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_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 5172 bytes
SHA-256: 1e64d9ce593a291ee58675d2006eb82e62a088aa15b6750ebb0dfc5f3b43cf42
font_01_sfnt_off00010010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10010 10860 bytes
SHA-256: c827d7f8f1480ba1e25c79e836642d00103f42bfcec6a9681106945b10df3441

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