Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd89135f83a52930…

MALICIOUS

PDF

76.6 KB Created: 2020-12-26 02:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 359a858c080d9b98d2d566c4b77d401e SHA-1: 89b5b25a4775a47c8ff1ff1c278ee07ada14d9ff SHA-256: dd89135f83a52930e31b6be20ad3c3bf98dd0cfa1192388237a82990546271e7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, and one specific URL is highlighted as a potential entry point. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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=ductility+test+for+asphalt+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5fab6c8ce65e4.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/kitexikel.pdfIn PDF document text
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/mesuvadegisibov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5fc3bc7ef4001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_5fb3cb6bde891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5fb2bb01c476f.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/9299269.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/bewibiwat/norazulural.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/vsec.in_final_result.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/lisp_cutdim_cad_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/restaurant_business_plan_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/knights_of_columbus_sword_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4096a45-cfc7-4699-8d6b-d3d3485c5e8e/rabelizafuzemoxudigisoviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3869cea2-28e7-4688-8716-e49670b4deb0/fusivu.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_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 5204 bytes
SHA-256: c39ec192c4fbc9c2dd39ad1dca15e186bef18cb39b7009b1ee14cae57ab6b79c
font_01_sfnt_off0000ffd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD4 10936 bytes
SHA-256: 51947e144c96c811f1eda85e65a4e5e40a9bb7aa402a5920f5d8c05bc4c06b1f

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