Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dc4d6c5f88e4e3…

MALICIOUS

PDF

84.2 KB Created: 2020-12-09 13:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc04d7135c7b0ba403d39a158a82ef1a SHA-1: 907cf8c5f6df024de7c50e80d0c4e254ae723abf SHA-256: 10dc4d6c5f88e4e31441061b5074182bde065fc67f7e3a7020325f1a089a919b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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://trafffe.ru/strik?utm_term=golden+state+fruit+basket PDF link annotation
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/lojawof_morokumomitiwol.pdfIn PDF document text
    • https://bozalugim.weebly.com/uploads/1/3/4/3/134343660/6801812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446377/normal_5fcc209e08143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuzamada/tozusewafejaxek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a50dde-b741-4965-8283-3cf9a4abcff0/aluminum_design_manual_2015_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd56bffb-4b2f-418e-ae9e-04056e9b7b8b/spc_utility_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29bd27cc-857d-4ff4-ad4b-d4a408b86841/54535434525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757d1f31-a44c-4f18-abb3-fc16382e5961/sumanasa_vandita_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62600eb-536a-4a77-aacb-238e5481b405/buted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaddf3d-d9ee-48de-bbd2-6a6b29409c26/tutifaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a81f65a-0d7c-45a2-80ed-b1dd2fc956ac/8830569266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d86f58-d97f-46e2-801a-f10a3f586abf/maketazututatikuxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc2aca2145a8629dc083a21/1606593700857/dinigalatuneruk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c91192c50b1a1e906058/t/5fcce5a35d2e6f3bda3cec89/1607263654434/69110782743.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 5136 bytes
SHA-256: fa441bc2e7867f957c0e906889681d27cc9009662abebe4e6d306e3fea8042af
font_01_sfnt_off00011ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE0 10904 bytes
SHA-256: 2534bbe3d852c0b5f0377ae66499f8d12d0e38711869aa249eeedf81ac200816

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