Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aeb2805ca5e7884…

MALICIOUS

PDF

91.0 KB Created: 2020-12-19 22:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d5f286c4eae743b8a3f50c6381a2f0f5 SHA-1: 9c1c286051e0cb378d70a6b3b74321420adcb352 SHA-256: 4aeb2805ca5e78848f06b956157b16a75708bf2e0e80dc11f2357bd461e5e3ad
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 0.9997

Heuristics 5

  • 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.
  • 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://trafftec.ru/aws?utm_term=reality+is+broken+jane+mcgonigal+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8b82c46e8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f8cfacf8e404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_5fa8062c12157.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/pisaxipolig-zelares-vukaw-wimewiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8bb411a80af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fc08690ad42c.pdfIn PDF document text
    • https://gewilede.weebly.com/uploads/1/3/4/3/134311853/saditu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5fd7934ee5389.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/18746d53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee5e2edfcd2bda90213d/1606217313264/walmart_my_schedule_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf4c500f7af3919d2d4c1/1606218950400/oompa_loompa_song_roblox_id.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe47715147b14804ffc6b0/1606305649049/63716916987.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_off000121ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 5864 bytes
SHA-256: 1227aaf20a45861743e603c5d07613e87e5b4d09cb204a86f08093779b78a014
font_01_sfnt_off000135a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A2 14072 bytes
SHA-256: 92e4372ca2b5c738c9857b5d67ed53d9a8072de3a602fd47bebec49e79a1d464

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