Malicious PDF — malware analysis report

Static analysis result for SHA-256 354ac962bbd0a728…

MALICIOUS

PDF

104.8 KB Created: 2021-03-23 01:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bbf4e9a3a868f0d554b29b0e3121a807 SHA-1: b6c68d313b8149211678ea9a039d2254617f4979 SHA-256: 354ac962bbd0a728a7dfa6651a4dfd9bbf547021670e0f955487de284f53c374
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to be a lure related to vehicle parts, further supporting a phishing or scam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://nipisod.ru/wix?keyword=ford+ranger+parts+manual+pdf PDF link annotation
    • http://kubuvifabitowib.iblogger.org/what_a_man_thinketh_james_allen.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/f1g6Mgf/dumb_charades_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/IxUifhj/xprofile_gold_apk_cracked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_6043884899a90.pdfIn PDF document text
    • http://zalofamanaw.22web.org/45430707925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ff12465806e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b81829-19a7-46a1-bfbe-17a2c1ea1739/dunkin_donuts_frozen_coffee_nutrition_small.pdfIn PDF document text
    • http://jemavasaw.rf.gd/maze_runner_thomas_scorch_trials_trailer.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_5a754696b2b048148d6fd804912b9b29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd37688-6acc-45ce-a3a7-d9d243919fb5/18856560664.pdfIn PDF document text
    • http://xotilumezimak.rf.gd/zedarosoguz.pdfIn PDF document text
    • http://kunesapog.epizy.com/what_is_the_story_the_yellow_wallpaper_about.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_945246f5cb434865849a6a473f80af55.pdf?index=trueIn PDF document text
    • http://vibesegajepo.epizy.com/85313316747.pdfIn PDF document text
    • http://vomitad.epizy.com/coast_guard_medical_careers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14730 5316 bytes
SHA-256: 4173c385729b0fa6bd324b672c1dc6a213bedb83967d1b99804fe16d2474f5fe
font_01_sfnt_off00015937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15937 10868 bytes
SHA-256: 7b2dea6906cd30ac8a2d32b620b58ca11aeec90172dcbae43e2263626332028d
font_02_sfnt_off00017ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC3 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995

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