Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f38d54018dffa96…

MALICIOUS

PDF

85.4 KB Created: 2020-11-20 08:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c0d54a82f6ee2b2a8d2178d6dcbda398 SHA-1: 1f3f316c8843e49b330d2da3f619a90b66b299d6 SHA-256: 8f38d54018dffa96703df37703881593cfc4b19c704672283605b0d759be7705
176 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this file as malicious phishing content. The document's structure and embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=pokemon+ultra+moon+post+game+guide PDF link annotation
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/9328372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5fa68f268f3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5f91ed34751a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5fa537134fe72.pdfIn PDF document text
    • https://zexivavu.weebly.com/uploads/1/3/4/8/134872555/tuwaxututinopif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_5fb57dbf9a9c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_5fa5bcca1baa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f93bf2a3ff0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f88963fac809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_5f9b0adcab25c.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/wukulavavotujozasuxe.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/tetazino/26895687141.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/54665917022.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/jixog.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/telecharger_alter_ego_b1_gratuit.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_off0001113d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 5344 bytes
SHA-256: 9088e5cf37c8b03013fe8d835004c4c122677e219c36c787e48e082bc01b68f7
font_01_sfnt_off00012351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12351 11060 bytes
SHA-256: 8bd67d12aeb27d5b5e6f0d9d1c465341a9004d9755c6984d5438a744eddc4e98

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