Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f25fb7242e8980…

MALICIOUS

PDF

81.6 KB Created: 2021-03-16 20:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0adce06e791d307766716bf295043e4 SHA-1: d9eef4f119595030df39438a9b95e89f275090c0 SHA-256: e2f25fb7242e89802e47a22cdc4ef9db71056034bf33f3fced52a016d27fe874
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=effects+of+indirect+rule+in+east+africa
    • http://poguzozod.sportsontheweb.net/xuxanexijokezij.pdf
    • https://cdn.sqhk.co/redusebi/hjhE6oZ/digefubasivuvetefilinu.pdf
    • https://cdn.sqhk.co/kugefiruxat/cEgdjjQ/jevumev.pdf
    • http://pejelurim.getenjoyment.net/99281438314.pdf
    • http://pifemukopisare.sportsontheweb.net/waterfall_model_in_system_analysis_and_design.pdf
    • http://wotaxatumumodok.sportsontheweb.net/30527704222.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_1fb886ee66ef4065be73dbf436aeb61e.pdf?index=true
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_f45abad2a9d7464882189457be7e32df.pdf?index=true
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_d281617b76604de3a33c112f98d65043.pdf?index=true
    • https://s3.amazonaws.com/labitajaxatufib/xilipixodojom.pdf
    • https://0bc2ebcf-5b85-435c-8290-6c6350a165f2.filesusr.com/ugd/ee98f5_3af42e68a5eb44f7a7030e8efe2e39db.pdf?index=true
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_dc63fa8f115c4ca6bb8da86d27d09d3d.pdf?index=true
    • http://japumuvepabez.rf.gd/ap_biology_textbook_campbell.pdf
    • https://s3.amazonaws.com/bubodeliza/22617947525.pdf
    • http://dibadedogiw.epizy.com/cerebral_palsy_examination.pdf
    • https://s3.amazonaws.com/zulezov/how_to_do_watercolor_on_procreate.pdf
    • http://wobadumiravolu.atwebpages.com/baltasar_gracian_how_to_use_your_enemies.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_off00010182.bin
acf918030385bf5c38d23bb49163b9b0b0eccbe7b4a29afba8a66c925786308b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 4972 bytes
font_01_sfnt_off0001127d.bin
1cccad01b2989ba47e0b63bc71ca230fcdc0929b35dfdfcbeeb127fccb671cc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1127D 11700 bytes

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