Malicious PDF — malware analysis report

Static analysis result for SHA-256 070f87728952a6ea…

MALICIOUS

PDF

70.0 KB Created: 2020-11-20 02:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20059dbe65313c3982e4246f17c6b2cd SHA-1: 1f9fd0bc19be80a5337f9c45c935d2430300b61a SHA-256: 070f87728952a6eaca3ee3d2d7717bc5e754b9f7b11b03bab3e0c066674879fd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or hosting malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=teas+v+test+dates+2015
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/rifunumamuw_nagemonevet_bifesoki.pdf
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/setefisumuwivusota.pdf
    • https://davijoxo.weebly.com/uploads/1/3/4/3/134357566/b083918.pdf
    • https://votixired.weebly.com/uploads/1/3/4/6/134633812/pidezosizudeguzunok.pdf
    • https://mesaxejako.weebly.com/uploads/1/3/4/0/134097573/gevivoximararanoge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/075abf11-adf4-4823-8c1c-6eb3c813365f/44322077077.pdf
    • https://s3.amazonaws.com/tetazino/umbilical_granuloma_nhs.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/55349514706.pdf
    • https://uploads.strikinglycdn.com/files/26588836-1e16-49ee-8b8d-36b0277ef3a3/hp_17-g121wm_cooling_fan.pdf
    • https://s3.amazonaws.com/sesafefanulokam/paulo_coelho_el_alquimista_gratis.pdf
    • https://s3.amazonaws.com/sugowubuf/bivamaxatapelowumaxamo.pdf
    • https://uploads.strikinglycdn.com/files/b42339fd-421a-44d8-a9ed-0986674b9d91/wubikuvaxi.pdf
    • https://uploads.strikinglycdn.com/files/c341d81a-e920-4357-aa2d-2b7847144f3d/palacio_de_miraflores_jack_ryan.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_off0000d39b.bin
85e9d8845cc8eb28cec5f74a9fd7311e99b48e430e85f76217761e22b2aa86e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 5152 bytes
font_01_sfnt_off0000e540.bin
1b669a5cf44025bc4a68c0c1d6148aa541834a9b1d54ca7083d7048237687804
pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 11348 bytes