Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c295c1cc04cdce5…

MALICIOUS

PDF

87.1 KB Created: 2021-05-20 12:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ba41e514be0019e7397fb6504dc91ebd SHA-1: 1fdc7d8913ca890aa36ca74b4696f0266314194e SHA-256: 7c295c1cc04cdce5009eed3edf8efb1d922c192add551fe9136c8b2755bfac94
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jacksth.ru/strik?utm_term=asme+pcc-1+pdf+free PDF link annotation
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/6590405.pdfIn PDF document text
    • https://vinatisuxuzelo.weebly.com/uploads/1/3/4/7/134770563/povetad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485946/normal_5fdffa88415e2.pdfIn PDF document text
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/b3b9aa67e137.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/8056497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_6041f455ceea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_600c01943676f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5fd9a9c40aa2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bodajaku/when_to_plant_native_grass_seed_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f8c1b7-d116-44a4-9319-388c87d0b662/what_is_meant_by_trichromatic_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/sowux.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/41883347972.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/reason_for_leaving_job_form.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/28589827857.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/66316305745.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/kenmore_elite_dryer_troubleshooting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/65790901893.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/child_support_information_sheet_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60df0e65-7a4e-42d3-b922-87320b803230/97538561439.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/68683365812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a65f6cc-0a12-4318-82b4-845846eb7ce3/inequality_word_problems_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/25048887858.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11275 5132 bytes
SHA-256: 302d2a6fdde517aa17b1745c7b6d0135f02578771ac10e8c3b8d4f234436ec06
font_01_sfnt_off000123e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E7 13128 bytes
SHA-256: 836545b27cf56b3d15518951d6f8afc563cb3cf769c79cc2d6808eaa6f40ffba

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