Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c91928073675e1…

MALICIOUS

PDF

54.5 KB Created: 2021-02-25 18:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4308e8110c7af7278c8c20fb0baa0ebe SHA-1: 5a400bb90f175369aa8b11799a071c4aff871510 SHA-256: 13c91928073675e14ab1de386db085374ec3db170192954a8474c8ca73abe2a1
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5700

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/award?keyword=ryobi+table+saw+accessories+home+depot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410730/normal_600cfbcd2c677.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/97490499446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_6026b3be78d4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_5fe74dc28c035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5fd30e2593706.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/mystery_brain_teaser_puzzles_nz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_601a1b91184fa.pdfIn PDF document text
    • http://reactivascotia2020.com/19381201123hrul4.pdfIn PDF document text
    • http://sagebiwepul.22web.org/investigation_4_diffusion_and_osmosis_lab_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_600fa0d2a8434.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/zekuvem.pdfIn PDF document text
    • http://xuwanozofugis.epizy.com/pdf_to_word_converter_online_free_candy.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/are_pointers_cuddly.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/panuje.pdfIn PDF document text

Related samples 8

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

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