Malicious PDF — malware analysis report

Static analysis result for SHA-256 7269ebccaf1204e6…

MALICIOUS

PDF

74.1 KB Created: 2021-03-04 03:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 49e1bc6350fd9235c84a251ca8dd69f5 SHA-1: 84b5f76c256566ffa129fb6891921ebba3e88da0 SHA-256: 7269ebccaf1204e66ae594d25be88d99fb2ae48f6c9bfb219899f3d1204ca795
186 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 0.9999

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=kitchenaid+stand+mixer+6+qt+black+friday PDF link annotation
    • http://xorabawik.medianewsonline.com/86500993547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470964/normal_5fe79170c2127.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/les_miserables_cast_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/jigg4OI/royal_farms_arena_baltimore_maryland_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_602b3c519db71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5fe751c60de1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fec18c417177.pdfIn PDF document text
    • https://mixenabunagoxo.weebly.com/uploads/1/3/5/3/135320093/sexejevomakuru.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/ggeligJ/retired_nascar_driver_killed_in_plane_crash.pdfIn PDF document text
    • https://bevoparekev.weebly.com/uploads/1/3/4/0/134018333/mazaputa.pdfIn PDF document text
    • https://xixebume.weebly.com/uploads/1/3/0/9/130969831/nuwepa-finujuzetas-wenuvotitije.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/acAjdBt/88397357977.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/iUhghgI/nizaxomorilezavigiwota.pdfIn PDF document text
    • https://kuxiwapanipajof.weebly.com/uploads/1/3/0/9/130969705/445025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzuxutetug.atwebpages.com/85319772090.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/medieval_2_total_war_units_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/damem.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_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 5884 bytes
SHA-256: ec2646ccbfd95e36d54bcf9e7a47e9edb360473751b38a40a7dd42faa2143e0a
font_01_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 11436 bytes
SHA-256: 9917374e1d0106ef5f4e3008889e7fbbb79b687a480bb3ec1ca96d27dad6ce66

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