Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7cfc870592993e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 05:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc321288906abe326f9415d032fba55 SHA-1: 238ff55f6f30e0254cf13b308b0b29f19fb84ad1 SHA-256: af7cfc870592993e61b9157ccebf383146c152c5f52d14af541c000f6d94fd0f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to 'Whirlpool refrigerators on sale', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://resalured.ru/strik?utm_term=whirlpool+refrigerators+on+sale+near+me
    • http://help-verification.com/charity_organisation_business_planil1vd.pdf
    • https://static.s123-cdn-static.com/uploads/4366017/normal_6008c2de09a94.pdf
    • https://cdn-cms.f-static.net/uploads/4403428/normal_6058cf69be4a8.pdf
    • https://cdn-cms.f-static.net/uploads/4476001/normal_601295ad6e35f.pdf
    • http://jovasetiveduza.scienceontheweb.net/15528135235.pdf
    • http://vilopeg.xyz/111624101343s9g4.pdf
    • http://usesalle.xyz/joletajogubezusajemejamid2kkm.pdf
    • https://cdn.sqhk.co/dabeluza/PtIEif2/57924623322.pdf
    • https://cdn.sqhk.co/diratukuz/LikXjem/save_the_fish_game_fishdom_online.pdf
    • http://lonemap.medianewsonline.com/wirulo.pdf
    • https://cdn-cms.f-static.net/uploads/4419204/normal_6046c47e4e5a0.pdf
    • https://cdn.sqhk.co/fofubulami/ahchgid/fapovi.pdf
    • http://nanebaxexob.getenjoyment.net/graphic_designer_jobs_nyc.pdf
    • http://vumajuzatijerak.getenjoyment.net/periodontal_abscess_treatment.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jifimurosesapu.atwebpages.com/66972970742.pdf
    • https://uploads.strikinglycdn.com/files/c8f28fd6-ede1-4617-a38e-984199cbd3da/31841094046.pdf
    • https://uploads.strikinglycdn.com/files/e76a27e9-9e33-42fa-88c1-368c0c6a0218/wonov.pdf
    • https://uploads.strikinglycdn.com/files/8aa27e8e-b507-478c-b44c-1d9106dba999/nexesodu.pdf
    • https://uploads.strikinglycdn.com/files/245ec397-492d-439e-8eac-d60634743640/kawanamasusuxuwu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e1.bin
78afb65d13654135a90136f04c6fcd68edf137b86852af833513a45592718c6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5328 bytes
font_01_sfnt_off0000fbe5.bin
249402fffd335c34875987afc53c625a019578644e93c7d283facf35081679a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 10920 bytes