Malicious PDF — malware analysis report

Static analysis result for SHA-256 304465bc2dd5f461…

MALICIOUS

PDF

67.5 KB Created: 2020-12-07 22:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 39a4c02e6662b891bf0ffa7a73c86fa6 SHA-1: 1d0d75f8c7708b381907c74c806ebdf9965514ef SHA-256: 304465bc2dd5f4613e591887bf42cb6c47d0cbeef2473c778f80348566da9c0d
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to direct users to malicious sites for phishing or malware delivery. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=mass+media+research+wimmer+and+dominick In PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/jabudelilusapo_rizal_dakev_puwufelir.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/zukunumig.pdfIn PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/tebodenosebonel_tazinuzakap_duvete_wesusutuzo.pdfIn PDF document text
    • https://dexidexida.weebly.com/uploads/1/3/4/2/134235246/354788.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wukara/chistes_de_monjas_picaras.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/unblocked_cool_math_games_bad_ice_cream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72022608-e95f-44c9-9f08-9a9fd5f72eda/94590785576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b76b98-9601-47fb-a740-284456d107f3/classcraft_xp_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/ponefuligukijede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af19b95e-154b-46df-859c-4e2d16164f61/bejerivereke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72de4cf7-e864-4353-a73d-00edfb783e6f/rujumomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a52a09-89d0-430f-854a-d50ecd481b45/94073649632.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/95140435187.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE8 5016 bytes
SHA-256: 5a30742030246cbeab931bb9443df32873c12c599345b6ce17020839d69f1e53
font_01_sfnt_off0000ccce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCE 11220 bytes
SHA-256: a19765253cd5725dc73f5a85fcccdfdaf6cb9c1d6fe9952b79bf7a173c066f24
font_02_sfnt_off0000f2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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