Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d37142e8051eede…

MALICIOUS

PDF

74.9 KB Created: 2021-03-02 21:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ef227833e3a138589bff61d84eef8735 SHA-1: e3670ec8f6fa443cbc1aa0b21e180eb0460604fe SHA-256: 5d37142e8051eede34f33d414424381fddecb17d0a4f22fcd6897db79ca435a8
126 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, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily corrupted, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=john+deere+425+garden+tractor+repair+manual PDF link annotation
    • https://cdn.sqhk.co/zinoliwomi/iemjihj/jajerela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_602e1a461cb1f.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/ja3Dhbd/cube_man_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jevunazuru/uhaigsB/baby_tv_song_lyrics_morning.pdfIn PDF document text
    • http://poguwukobewale.22web.org/animation_movies_in_tamilyogi.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/vusupedisekim-wedixalu.pdfIn PDF document text
    • http://viewcreditscore.info/peligumogdnj4.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/d4tjcji/jhaps_records_models.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/O1idSgg/elifoot_19_20_pro_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_601b5f872dcef.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/faletorin.pdfIn PDF document text
    • http://luzikudejijes.22web.org/75426385313.pdfIn PDF document text
    • http://naturalm.space/54790242707d5t41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 5644 bytes
SHA-256: eb5f65277a696fda9dae2b6642085933afec246335269c5b3286752c751591d2
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 10896 bytes
SHA-256: ca9ac7d5e60f85d64d378d8b4074f0e08370e9a7b04fc56ddced874a431d403a

Open this report in the interactive analyzer, or submit your own file for analysis.