Malicious PDF — malware analysis report

Static analysis result for SHA-256 466b2baed0f14d3f…

MALICIOUS

PDF

87.0 KB Created: 2020-12-08 06:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a9acdae80b77c29c8737059650f2fd7d SHA-1: def3ac36ae3f97f6cecf15917aed4bde5944c43d SHA-256: 466b2baed0f14d3f1f8f9a51d4c7119767ad4d5a7fa177563a57ea923f470efc
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://trafffe.ru/123?utm_term=farberware+3.2+quart+digital+air+fryer+manual PDF link annotation
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/banixodimoviwob_rirojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5f94633560ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5fa3cca330675.pdfIn PDF document text
    • https://sagudazotimoja.weebly.com/uploads/1/3/4/7/134753003/potazisefuv-jewufeteza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_5fbddc378be3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5fbb1d632b6f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_5fad97fad1e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8ee7cf608de.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/56f1532a-47f0-4834-8be5-9182e179c805/logiciel_mesure_plan_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/vegotudurapaxizopa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf720edabee7b4406e3e0/1606219553354/zezabigival.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd01373ca23154c95c124a/1606222137148/95649068099.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/free_celtx_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1c70a9-d796-468f-b253-86e5a96ed23a/knock_em_dead.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_off0001043c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043C 5564 bytes
SHA-256: b0669da8a529d48ef908ed96bf0e825bbfc0cb1b898508476e16dd8e75634e82
font_01_sfnt_off00011726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11726 12088 bytes
SHA-256: 002d99c1ef96573b0dc7021bc8a05e90736bbc76da0d1d51bb7b61fe21573df7
font_02_sfnt_off0001405d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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