Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c891874729e4c62…

MALICIOUS

PDF

79.8 KB Created: 2020-11-21 09:08:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 96994e74c3b29820af4130d4b1d054ca SHA-1: 9bf3a867aeac2fde1660251f54decfd68f4214a2 SHA-256: 3c891874729e4c626c89db87e77b69f652ce6af00feb4ef5de7c486360d33174
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 0.9996

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://trafficel.ru/123?utm_term=american+bee+journal+october+2015 PDF link annotation
    • https://wofexexugov.weebly.com/uploads/1/3/4/3/134318452/1789512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fb33c61748b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f9d7ab954efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_5f9ee947969d3.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/4784f5a2-dca2-413b-b1ab-25a0ca4b2c0e/jipugixoxano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374b1093-5a6b-400a-a0ec-e86785d6175b/1181604330.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/laxuzezivulu.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/wijekotiwelufovazaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c199add-d98d-4f71-ac1f-5984040c3545/www._hachettefle._fr_alter_ego_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02da735e-4023-438d-832a-9f2dff9e55aa/darazil.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/sm64_ds_cheat_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/daily_star_bangladesh_newspaper_in_english.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 5304 bytes
SHA-256: 19d639df53c668f3d52b60e8739142c11ab3e00508ee3811127cc1e1d6bec990
font_01_sfnt_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 11244 bytes
SHA-256: 0da31c1fcc6c6b81471a37ae9fc4d924f35264a8cd1dedfff7119d333d76deb4
font_02_sfnt_off000124a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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