Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c5b2d92b92f63f…

MALICIOUS

PDF

80.6 KB Created: 2021-02-20 14:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 09af79af45eb91ff5f2575539d503638 SHA-1: 0b7dbb37fc0bec30ad8c085f1f079f6d10927dbd SHA-256: 74c5b2d92b92f63fb67d5afc1acca7888136e9f46792e3dcea1a06cf7324eba3
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jottigo.ru/strik?utm_term=c%252B%252B+programming+test+questions+and+answers PDF link annotation
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/669269a4d.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/1249aaa2.pdfIn PDF document text
    • https://kukurako.weebly.com/uploads/1/3/5/3/135321284/93b685f007f5.pdfIn PDF document text
    • https://bixunirejo.weebly.com/uploads/1/3/5/3/135329058/ad7052f1.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/pokujibexiwekejese.pdfIn PDF document text
    • https://fagesuxolibedif.weebly.com/uploads/1/3/0/9/130969327/d2300.pdfIn PDF document text
    • https://pobivizitonep.weebly.com/uploads/1/3/2/8/132815986/wugegojor.pdfIn PDF document text
    • https://xirazaju.weebly.com/uploads/1/3/4/8/134859293/jusezafozulasot-votokiradul-wovej.pdfIn PDF document text
    • http://bosilubag.22web.org/jamaica_kincaid_on_seeing_england_for_the_first_time_summary.pdfIn PDF document text
    • http://weroserigo.22web.org/46185174292.pdfIn PDF document text
    • http://imm-shoes2.club/airbrush_pro_free4do2w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaduxovogemuke.epizy.com/north_cascades_national_park_hiking_guide.pdfIn PDF document text
    • http://namutogenasokab.epizy.com/bharatanatyam_dance_songs.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 5372 bytes
SHA-256: 6965e894ad14ff012e79f719eecf4899705b645dd1a40147a23d952c12e07e63
font_01_sfnt_off0001109b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109B 10868 bytes
SHA-256: a6ea6e6d79064c8ebb0eec6a5e21aca93e032473a686e97c002fcfc627389d18

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