Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f748d61e2cd735…

MALICIOUS

PDF

65.9 KB Created: 2021-03-19 07:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 851994f37c2bf91323799bc3f72c4c4e SHA-1: c4ed736030b0a72ce8e36c04dcccfd80043d8441 SHA-256: 29f748d61e2cd735f96b6bc78a49b98478aa594aecb605b52e659a8c3c4bfc99
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://kuzutuzo.ru/wix?keyword=african+american+stores+in+dallas PDF link annotation
    • http://kaxiwex.iblogger.org/moment_format_language.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/gijjeVX/8252507883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_604cdfec3fddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_603765b3f179a.pdfIn PDF document text
    • http://am-sound.ru/21810559331ompkq.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/bIgdaxf/geometry_dash_meltdown_apk_full_version.pdfIn PDF document text
    • http://draiwenstore.online/difference_bill_of_exchange_and_promissory_noterpt12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401540/normal_5fec8b538bfab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_5fd6a8707a2f8.pdfIn PDF document text
    • http://arm-watch3.club/82973955093da59v.pdfIn PDF document text
    • http://xsale.trade/spin_and_orbital_angular_momentum_interaction92455.pdfIn PDF document text
    • http://letgtma.bid/church_flyers_psd_templatesnvgdd.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/jfXhjuA/vr_cities_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowesotinik.rf.gd/why_is_my_hotspot_not_providing_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d48a727-c3ab-4a9b-b1ff-2d2f9afe547f/1995_polaris_xplorer_400_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a46a68-3d41-4a05-989a-0c9565c12be9/fodulam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60003cde-6af3-4e80-a006-4e76248bcdad/22448128406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfb95d7-744b-4fa5-9d0b-e5c31bd7cea0/tepodubibubudibunog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad0bfed-2128-41c3-861e-00e6bcefac44/transit_anna_seghers_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cc67bb-6d2e-4f3b-8c74-2dfeef8499d5/tixexonagibubamog.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_off0000c862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC862 5156 bytes
SHA-256: 5fecd7310acb7b312203aebf7b058e255b9440eef52221ab1e3dbb629d918aa1
font_01_sfnt_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 9520 bytes
SHA-256: af83af62bd931113aa8acaa967274d30e62796c2699aff8b992c7bbd664df1a4

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