Malicious PDF — malware analysis report

Static analysis result for SHA-256 4007c6b2d2cbed56…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 21:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fd730debdfd2522e31a40d8ec0f602ca SHA-1: 10784536843cd10a2a8a0739b8152156ad619e3e SHA-256: 4007c6b2d2cbed56a7e6a2b3981e418269e7a926e48d2f903b7a6f0cbd2a9d13
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=green+killing+machine+24w PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417525/normal_5f9c0980ca145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5fabb0689e98c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_5fabf6c0f2c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_5f9e6f2fec0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f8b7bf583897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f899c98d9cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5f9f59a334dfb.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/febopa/roburugovus.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/galenekenazupapozusiriw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5c0de4-84fd-4b8e-8b97-aac503efea14/52157857359.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/61285604056.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/to_kill_a_mockingbird_chapter_22-24_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/xepazimomidetuwerono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429bbae4-8b03-4dcc-89d8-739e29c66669/please_don_t_go_80_s_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/modine_pdp_unit_heater_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/arrhenius_vs_bronsted_lowry_acids_and_bases.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_off0000bad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD0 5440 bytes
SHA-256: d8b2abe2467475117a8e53859a946d7254aa6bf8b1d43e8198d7c6e584147c28
font_01_sfnt_off0000cd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4A 13072 bytes
SHA-256: 311ebe845cb12f6509df0969c8fcf0ef4dcea1cd1bdcfd4f065f0123c9944f4b

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