Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6df364c3192988…

MALICIOUS

PDF

80.0 KB Created: 2021-02-15 01:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5dc8c3bb08f86e6180313f0c345ec277 SHA-1: 4911fdfdde8b458fce929222db685b7bc96c18de SHA-256: 8c6df364c319298856d599394e0fb51d28e724c35752237bb2d677fc482a7ade
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9455

Heuristics 4

  • 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 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://seumenha.ru/123?utm_term=boss+tone+studio+manual+gp-10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471959/normal_6021cd431a40f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_60045a69224d0.pdfIn PDF document text
    • http://dektesheff.xyz/abcd_tamil_dubbed_movie_in_isaiminizhhtn.pdfIn PDF document text
    • http://1yamal.space/reservation_form_html_code3shtq.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/xGjfCib/internal_screen_recorder_android_9.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/hbhb9bP/82008704906.pdfIn PDF document text
    • http://appeal-ig.com/xizawurefeworag52fmc.pdfIn PDF document text
    • http://lastmarkt.ru/sim_dashboard_pculv4d.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/e7javjb/54186141193.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/gfGhabT/49087315036.pdfIn PDF document text
    • http://hotel-engels.ru/algebra_1_textbook_mcdougal_littellzv1ys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_5fd2a9c975da5.pdfIn PDF document text
    • http://jinujatafariva.rf.gd/ben_10_omniverse_2_psp_rom.pdfIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 20076 bytes
SHA-256: 36d15d4b9dd018f53aeef6d003cf9b5f2354e01ae9a9e810edb7de4268fafd60

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