Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5fe2510ce86941…

MALICIOUS

PDF

78.1 KB Created: 2021-01-12 16:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e06244dfc83f3564bb23690fb95ce6ed SHA-1: a72ce859b30505d6771e21bab1feb7022b461341 SHA-256: ba5fe2510ce86941b2d675ff6f7e1cb3954ac4c730d2482bcab957c5b7982882
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a URL that appears to be part of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the presence of embedded URLs and the heuristic findings suggest the document is designed to redirect users to potentially harmful sites.

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
  • 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://traffset.ru/aws?utm_term=jasper+report+format+string PDF link annotation
    • https://cdn.sqhk.co/nuroteditu/bgfhaTL/65631394849.pdfIn PDF document text
    • https://voxukosobezut.weebly.com/uploads/1/3/4/8/134846839/868551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_5fa91b894aed1.pdfIn PDF document text
    • https://jafowunasakubiv.weebly.com/uploads/1/3/1/4/131437393/4428511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_5fb7c72bbc2d1.pdfIn PDF document text
    • https://cdn.sqhk.co/fusatogis/jhJibuT/watanomifa.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/mipeboro/grievance_complaint_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/feeling_alone_tamil_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/audio_power_amplifier_design_self.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/avatar_hd_movie_tamilyogi.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/mubelirijifujorupubesu.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/territory_war_3_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/1360242008.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 5176 bytes
SHA-256: 086b3cc0304870befe8b6a1ece8798cdf833a3a8b90af0c951fc4f5964a8d0b6
font_01_sfnt_off0001020f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020F 12132 bytes
SHA-256: b5972993b8d9ff2ae55c3f6913a53c92d048bdc0076489c7561318e32062e250

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