Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8602bab05396ff…

MALICIOUS

PDF

72.3 KB Created: 2021-03-28 16:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: de5b1a0fee33e29f947eec1ab2e60ec2 SHA-1: 954b599da948a20bb92aee2f6f2b2be246fe7d73 SHA-256: ae8602bab05396ffe19a9e228d99097c1b9276a749c10d6ee08fd683e034057a
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 0.9998

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://golowaki.ru/123?utm_term=application+format+for+job+interview PDF link annotation
    • http://salonop.xyz/behringer_eurorack_ub802_review4gnjh.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/hh0wyna/guide_for_voracious_worm_io_snake_zone.pdfIn PDF document text
    • http://clubstore.pro/74261389798tdxi6.pdfIn PDF document text
    • http://1fps.ru/hp_laserjet_pro_cp1525nw_color_printer_user_manualelb8n.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/vXWjcIA/mapebojotateza.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/fjbQhcQ/watofikogubevuv.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/uf9kRgh/zombie_tunnel_colorado_springs.pdfIn PDF document text
    • https://cdn.sqhk.co/sulubejes/0fHNJQn/epic_race_3d_poki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_f96cf257eb42473fa32297409171ab0c.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_0c3da79eb9284d55915f72f0b3bdee56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf38fe0-e970-4704-81fb-7c55b518afa9/venapaxopefavip.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_76667f40115d480cbf6a361e06f692ba.pdf?index=trueIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_8b7b8b0269704e89b4bb0ea49f1e82fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2831e2a-b71d-4dcd-b25d-c56fdbe540a1/fulozinilanotewasedigam.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_4233f309889f4fafb0a8b1abf9bce8af.pdf?index=trueIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_55d706acb0b94a739546fe8835b6595b.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_a71d82d85b62489880de8e7866ed7156.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 5340 bytes
SHA-256: ee3c636c00913bc4a5a99ebce5d1809cbb429832600a04a1843fbf15e27e5793
font_01_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 10936 bytes
SHA-256: de9a4adb994f32295c89af69e072dc6bfcf65f480ffce9398add3a9c3bf3750a

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