Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a44e4e338a02d3…

MALICIOUS

PDF

63.0 KB Created: 2021-02-03 00:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c6d64a806d89e3e41289ba2a7de4f2b SHA-1: 7340338461abb7fc699578031e604ce221611a10 SHA-256: 65a44e4e338a02d357467d4fb15802f1345692e565f9a0e15d35a467b76fd0a9
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting and employing UTM parameters, which is characteristic of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8349

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://druttle.ru/123?utm_term=stoichiometry+volume+volume+problems+worksheet+answers PDF link annotation
    • http://onlinetyz.xyz/62447341926gjk0h.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/7605093.pdfIn PDF document text
    • http://zipibewivuxe.22web.org/73937921709.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/1585014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_601089c297664.pdfIn PDF document text
    • http://vejinow.22web.org/1375686339.pdfIn PDF document text
    • http://duwadomet.22web.org/sorovepelolad.pdfIn PDF document text
    • http://adanakebap.org/pegeva6wqz9.pdfIn PDF document text
    • http://alania365.ru/xebirenegawopufalazodawob3374c.pdfIn PDF document text
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/4fab8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5ff2d2c11964d.pdfIn PDF document text
    • https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/7ffaed50259e8b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kixomeremit.epizy.com/10978983545.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5732 bytes
SHA-256: 90032dbaf9165e82e97ff7ff6396c13c2c9e431e330942a59f78d17ec6ebb1a5

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