Malicious PDF — malware analysis report

Static analysis result for SHA-256 cceb7401989afb64…

MALICIOUS

PDF

80.1 KB Created: 2021-06-01 01:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc43feef98e1be50e85510cf4eb7a9d5 SHA-1: bb716359f9950d266826983c2fdf386902bf0aa9 SHA-256: cceb7401989afb641e1efdca2c7e9e9cd19e9e2c52557219b7b08fd1c1d6adbc
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to other PDFs, suggesting a link farm designed to attract traffic or distribute malware. The primary URL, 'https://infrive.ru/pbw?utm_term=corel+draw+x5+full+version+with+keygen+free+download', indicates a lure related to software downloads, likely a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://infrive.ru/pbw?utm_term=corel+draw+x5+full+version+with+keygen+free+download
    • https://cdn-cms.f-static.net/uploads/4471096/normal_605cac764ea33.pdf
    • https://cdn-cms.f-static.net/uploads/4448331/normal_5fd6f52cbcc70.pdf
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/maroz.pdf
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5fd349a6679a9.pdf
    • https://static.s123-cdn-static.com/uploads/4389821/normal_6006906003884.pdf
    • https://gowuriked.weebly.com/uploads/1/3/7/5/137505597/2cc36f268cf0.pdf
    • https://metekubop.weebly.com/uploads/1/3/1/4/131438843/2946120.pdf
    • https://cdn-cms.f-static.net/uploads/4418000/normal_606b90114e2d1.pdf
    • https://cdn-cms.f-static.net/uploads/4373516/normal_6027952f4920a.pdf
    • https://bamigabimav.weebly.com/uploads/1/3/1/6/131636977/jerikipa_mefapis_powuruz_zisuvemuzoro.pdf
    • https://zojolutavalo.weebly.com/uploads/1/3/5/3/135345328/bf3d0f4d.pdf
    • https://static.s123-cdn-static.com/uploads/4372373/normal_600085b4f0623.pdf
    • https://fagedanagaga.weebly.com/uploads/1/3/4/8/134876409/6d303e2443.pdf
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/menurixulaxov.pdf
    • https://gudifikopar.weebly.com/uploads/1/3/4/6/134627505/01a138.pdf
    • https://xivibivo.weebly.com/uploads/1/3/4/3/134353446/ruduwun.pdf
    • https://rezosegog.weebly.com/uploads/1/3/2/8/132814067/7e682f225dcc0.pdf
    • https://cdn-cms.f-static.net/uploads/4459057/normal_6023f4f2de5ea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/01aabf0a-875c-4db8-a85b-7a0a7ac8cbfc/how_much_does_solidworks_flow_simulation_cost.pdf
    • https://uploads.strikinglycdn.com/files/29e7c505-0ca7-4c81-80c7-c19de4e64fe3/y_que_paso_con_lunes_pelicula_completa_en_espaol_latino.pdf
    • http://palixazoke.pbworks.com/f/xolosu.pdf
    • http://kokoxudalux.pbworks.com/w/file/fetch/144428649/megupasudonozode.pdf
    • http://didaneguk.pbworks.com/f/sogezaxebew.pdf
    • https://uploads.strikinglycdn.com/files/0bd716a4-9ad3-4200-85a6-8d2c4f4113df/dnd_5e_hexblade_guide.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_off0000eb60.bin
f645e3cca9a222508620063c94c5a2fc4336383c1648a6cdcd63e185a357787a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 3652 bytes
font_01_sfnt_off0000f870.bin
98f5ee8a8b1648398912acb5067221e0fb16366e8814f81cba04880363a4e906
pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 5584 bytes
font_02_sfnt_off00010b8a.bin
25964fc7a8ce09fcd6cecf1027dd6c667a4ef86e06944460eeff19ec97d93c8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 11308 bytes