Malicious PDF — malware analysis report

Static analysis result for SHA-256 d069484858cdb9c1…

MALICIOUS

PDF

96.8 KB Created: 2021-06-08 20:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: baf591fcfa304754205b38cc3d227015 SHA-1: 9a4ea8d8552770d61e07dc86ab6df4d5950ca86d SHA-256: d069484858cdb9c10dabefd0b7259b0c8b4669aa31805c995e73d41f2efd984d
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://huntic.ru/pbw?utm_term=the+most+useful+idioms+in+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490129/normal_602ecc0d0340d.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/4616356.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/68c4b060cee9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_6069c026cf8c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5ffb950cb9cf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_601332056ad13.pdfIn PDF document text
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/mitobelakidaxibifo.pdfIn PDF document text
    • https://xukoperupe.weebly.com/uploads/1/3/4/7/134743664/suwupupilum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_604edcbcd5d79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bovozajezo.pbworks.com/w/file/fetch/144623382/donexud.pdfIn PDF document text
    • http://junerew.pbworks.com/f/ejercicios_de_distribucion_normal_resueltos_con_graficas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ae77f2-2e21-4522-a7dd-b20a7ec12e4b/wezakipedibuvukoxuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a9c4f4-ddac-4b6f-bc0b-0a96e5172146/graco_4ever_car_seat_forward_facing_installation.pdfIn PDF document text
    • http://numefen.pbworks.com/f/19606811874.pdfIn PDF document text
    • http://kunozulig.pbworks.com/f/tufal.pdfIn PDF document text
    • http://tejudafo.pbworks.com/f/how_to_connect_backbeat_fit_3100_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5896be2-5ee5-4c7e-9e51-e8f58d56081a/ragonerivisoturoli.pdfIn PDF document text
    • http://zotugon.pbworks.com/f/tiktok_like_tool_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1635ab7-e08d-41ef-8dc1-b7364ee04cc5/28966660622.pdfIn PDF document text
    • http://junerew.pbworks.com/w/file/fetch/144519372/33151122245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d6f3f5-4aae-4901-880a-23c7297e647b/mr_coffee_caf_barista_espresso_machine__best_overall.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_off0001400c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400C 4964 bytes
SHA-256: 086f47663777eed0e8c33d9ac8787be32e0f2b01493f9d0f5aa39d2e1fd64384
font_01_sfnt_off000150d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D2 10964 bytes
SHA-256: 690931fe1a713163391cc509e4ac94b062b3b8d49a37ce749b8b83499be800bc

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