Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab97323a9067d02…

MALICIOUS

PDF

70.9 KB Created: 2020-12-25 15:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 41681db1b6e25534bf301fb3e825f621 SHA-1: c7462667aa367f992876674d8222a83eee6e0073 SHA-256: fab97323a9067d02d900e482e20acc6efcab42f250dfea0f6e1aed854f6a938f
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files hosted on services like Weebly and Strikingly, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate an attempt to drive traffic to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=world+basketball+challenge+your+unblocked+games PDF link annotation
    • https://direnebem.weebly.com/uploads/1/3/4/6/134641367/6929e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_5fbaba71a9ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_5fa7a4f432c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f956b24c46e1.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/4909952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_5fb716e47669f.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/kugubetaxufiru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5fa4ad24275d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_5fbf1dd3411cf.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/ff19419f-40dd-4c0c-8fb8-32a6832bc731/vidmate_apk_latest_version_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9948e9-1520-4b2c-9eca-c4cc06932ff1/nidedovusigifuxulusizo.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_off0000cb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB00 5508 bytes
SHA-256: b39ab674cfd6a2ef0ba0f42058488662ce0286d9496d222f68eb2cc998af5f33
font_01_sfnt_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 10240 bytes
SHA-256: fbc9282268ad5eab22ba2061aa802eb386aef499e0c55684ff40f77356394282
font_02_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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