Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0fe925384e20a9…

MALICIOUS

PDF

79.3 KB Created: 2021-03-31 17:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ade6fe1681f5b88307cb86c5c7625d2 SHA-1: 7c2af062b31d196217b00ce09caea073c4bec965 SHA-256: 9e0fe925384e20a90c9ff2d19cae6bc46fcf195686af41cdfa5c49a687ab8457
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also flagged this file as malicious. While no scripts were explicitly extracted, the presence of numerous URLs indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/123?utm_term=mariam+khan+reporting+live+cast+and+crew
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fcb94f696a27.pdf
    • https://wikivosunox.weebly.com/uploads/1/3/2/7/132741322/8349554.pdf
    • https://cdn-cms.f-static.net/uploads/4394061/normal_60531e1642ca0.pdf
    • http://erethiztzj.space/my_factory_cake_tycoon_idle_tycoon_hackhhc3l.pdf
    • https://xomivevisavuwog.weebly.com/uploads/1/3/4/8/134852088/ratamapavurunudekav.pdf
    • https://cdn-cms.f-static.net/uploads/4378153/normal_602416fe0d3db.pdf
    • https://cdn-cms.f-static.net/uploads/4471249/normal_600caf571fb93.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_603e4ad1aecb7.pdf
    • https://popejevolifol.weebly.com/uploads/1/3/4/6/134609596/1536069.pdf
    • https://cdn-cms.f-static.net/uploads/4499334/normal_604f06dd83df9.pdf
    • https://cdn-cms.f-static.net/uploads/4460255/normal_605f61a3b21a8.pdf
    • http://idealica-tufficiale.website/carbolic_smoke_ball_case62fyv.pdf
    • http://monoga.space/the_lost_spires_downloadux0yl.pdf
    • https://cdn-cms.f-static.net/uploads/4377113/normal_6018eb7e7ae52.pdf
    • https://lonapumerupa.weebly.com/uploads/1/3/4/8/134853684/7280749.pdf
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5fcbde213b5f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/726d0057-ee06-4662-b5c8-2318d32c5b9f/lafezigamuluxotolo.pdf
    • https://uploads.strikinglycdn.com/files/b0b95285-e7e3-4e0c-bc17-03d6b92de66a/62547823622.pdf
    • https://uploads.strikinglycdn.com/files/35873aba-b394-44a0-8e66-ab810b76343d/64933295065.pdf
    • https://s3.amazonaws.com/jazofi/55619658001.pdf
    • https://uploads.strikinglycdn.com/files/bafdab5f-cb4c-4dab-a20f-b49a40a36e5b/austin_town_lake_trail_closed.pdf
    • https://s3.amazonaws.com/zolerazowubow/too_big_to_fail_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e5.bin
338f8b7472101fd9aef8e89554c3c4ed8064bec09cf1c90cabd592dfd6aa7fa8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 5496 bytes
font_01_sfnt_off0000fa81.bin
b776ae09af6a97f7a285fe3a7b59720a2d7266c4a1eb46d34217d56191f2c92a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 11476 bytes
font_02_sfnt_off00012197.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12197 4324 bytes