Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb04678a48870e2e…

MALICIOUS

PDF

78.8 KB Created: 2021-03-30 18:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dca6dda012792a75b125925196329cdb SHA-1: 546794299c25651e4ac6065706a19e11f40f3a34 SHA-256: cb04678a48870e2e6c0ff1e2a609c594b0154c11010ffc5cf5ae9c28f86ba3ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/wix?keyword=lenovo+s145+laptop+manual PDF link annotation
    • https://jujowaganul.weebly.com/uploads/1/3/0/8/130874338/3cea2df9e00a.pdfIn PDF document text
    • http://banquepopulaire-fr.org/nukezemiropetalagowosotitqcqt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_6015d39b994fc.pdfIn PDF document text
    • https://fuvuliles.weebly.com/uploads/1/3/4/9/134904701/7058627.pdfIn PDF document text
    • http://mrt36.ru/wormax._io_videos_de_prow3vru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5ff5a4c67ed0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_60468d1c4ad9b.pdfIn PDF document text
    • http://fitokapss.xyz/boom_boom_pow_clean_lyrics737qr.pdfIn PDF document text
    • http://apparentlyopt.com/sapijufibosafepikmm2y7.pdfIn PDF document text
    • http://testrun.ru/sidapepexuravaraxodilik2qbud.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/vevepegawujewovedutafos.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/1120497.pdfIn PDF document text
    • https://kuwepokipeluzil.weebly.com/uploads/1/3/0/9/130969114/d2b8dc3cd.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/19504819862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_602fd33c2f873.pdfIn PDF document text
    • http://hugertely.xyz/sadurojaviwegelala29j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc0ed73-689c-47ef-9df7-a67da15da125/que_significa_cuando_se_rompe_un_anillo_de_oro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5030ef-c5b8-4685-a722-2797d360a6d1/what_book_came_after_flowers_in_the_attic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7997a78f-30ad-49eb-a764-e4c3dcd6bb6f/breitling_aerospace_evo_titanium_black.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_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 5132 bytes
SHA-256: 06118761df7d772c275353c7bf2b5a2b0de31354ae91b55cedecbbdf3cae5150
font_01_sfnt_off00010702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10702 11464 bytes
SHA-256: 4c7fd166a55fc8a83e0fd7ea1365aabcf442d32dcef452a7fd2d4733f975516c

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