Malicious PDF — malware analysis report

Static analysis result for SHA-256 6509f6047041ea64…

MALICIOUS

PDF

71.8 KB Created: 2020-11-24 11:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 901b3e4e80e214939e7cdfaa804dcf33 SHA-1: dac3f6e57394e4ff00bc0f2ff1997283d1633e26 SHA-256: 6509f6047041ea64c76f0e2c2f6f1e12aa1ab9712dfc3b9278260ca0301246d6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffi.ru/strik?utm_term=descargar+corel+draw+portable+gratis PDF link annotation
    • https://zitokafinug.weebly.com/uploads/1/3/4/7/134738680/bd537dbf2.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/sopebozelumoselop.pdfIn PDF document text
    • https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/nuwerevutikat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f8f08f833bf5.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/7971639.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://sawilemevopano.weebly.com/uploads/1/3/4/5/134577559/rusixetufisuvisinox.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/d9ffd75d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f9a3b631ddb7.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/6018413.pdfIn PDF document text
    • https://lifuregetarip.weebly.com/uploads/1/3/4/3/134384561/8966679.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/robumuduluwise/when_dinosaurs_roamed_america_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/sewipedigediruludaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/ginnie_mae_investor_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/stretching_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe68e4b7-371f-4a17-8aac-7dbd3daf90b8/abs_after_40_nutrition_system.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/52877968762.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_off0000d57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57C 5472 bytes
SHA-256: a3fbe8bbf6bee475a6799a93d8d109e063ac9902c058951843065e0f5b49c18b
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 12060 bytes
SHA-256: b79e80fef6dbd94a6cad8559260cab9763f379c5005c071e0c652acd298c52fd

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