Malicious PDF — malware analysis report

Static analysis result for SHA-256 15968087ea12f47d…

MALICIOUS

PDF

80.8 KB Created: 2020-11-18 19:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c9ede6334640f1dfe8e2c76389163be SHA-1: 1d24311e60bc4eee04670d1d3c377c19c98bfd99 SHA-256: 15968087ea12f47d4ef94891537c812e6cb298f1f11ce1b2bea36a33476a5372
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the primary function is to redirect users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=land+of+stories+movie
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fa46566091d8.pdf
    • https://gazododisup.weebly.com/uploads/1/3/4/7/134720907/30ea64.pdf
    • https://bosesabefo.weebly.com/uploads/1/3/4/3/134362720/paxupaxujisime.pdf
    • https://cdn-cms.f-static.net/uploads/4407795/normal_5fa5bc7669b11.pdf
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5fb49ff9d6f4c.pdf
    • https://valoxapemep.weebly.com/uploads/1/3/4/3/134305175/rajobebuvivijox.pdf
    • https://naxazutip.weebly.com/uploads/1/3/4/6/134610322/5f4f68190ff3.pdf
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5fa142f06d334.pdf
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/34604.pdf
    • https://mimejomukokije.weebly.com/uploads/1/3/4/5/134510045/zoduwomi_lexijexa.pdf
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/b142a4823b3a71.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/mifakosawafisadipop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fd10d42a-0f76-4423-b2cc-0e7c65d6a5e4/mukideruvikexudo.pdf
    • https://uploads.strikinglycdn.com/files/6633ab99-6124-47c8-8bc9-db558b0842ce/83041709851.pdf
    • https://uploads.strikinglycdn.com/files/b77fd7b0-19ca-4319-a41d-f0eaed7f033b/metodo_de_tanteo.pdf
    • https://uploads.strikinglycdn.com/files/0b0b2992-3103-4b3d-97d6-9c3a1d587bf2/wekavuvopaxosa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff04.bin
f743b77f0f05ce33ca49007082b000b50cce187422f924c5d81b84b81fc666ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 5020 bytes
font_01_sfnt_off00011012.bin
9394ec8da69ef5f84ed5989cca3bc59e6504b5b55a1c02a70cca21a698bbf5e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11012 11412 bytes