Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97ef4b4dde1bfd0…

MALICIOUS

PDF

64.1 KB Created: 2020-12-24 22:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6374f0723b916112bd105ba435a368d5 SHA-1: 48976c7041eb27b8ad9015a9e6c4dc5142038a26 SHA-256: b97ef4b4dde1bfd08578ae2a48685a529de9ed055c9a94445fa4916a1c7a030a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://traffine.ru/strik?utm_term=minecraft+classic+mobile+free', likely serve as lures to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5465

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.
  • 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://traffine.ru/strik?utm_term=minecraft+classic+mobile+free PDF link annotation
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/ruxusopunude_befif_vosam.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/tumuzo_jonevevivoxoxu.pdfIn PDF document text
    • https://furevevesegino.weebly.com/uploads/1/3/4/6/134653878/2852551.pdfIn PDF document text
    • https://cdn.sqhk.co/liramesot/RQM1je7/zenonia_5_offline_apk_unlimited_zen_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5fe41ebd9f0fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_5fcf945c2413c.pdfIn PDF document text
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/woruj.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/1800944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fe2d9c9655a7.pdfIn PDF document text
    • https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/4a1e60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4c6c419b-faea-4bf2-8d92-a8b1707d8f5b/gepovekazotobojewaxe.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 4960 bytes
SHA-256: 0dd1129377962a29a084e572a2cd40d0dba4d21510ac11f6df16e694bca1c8ad
font_01_sfnt_off0000d28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 10296 bytes
SHA-256: 60c8cc100b04e8ddb50e7582cf4d9a9fd7b7bc1d46e7513d5de47d7da46321ac
font_02_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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