Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72fb8338fb68eeb…

MALICIOUS

PDF

78.9 KB Created: 2021-02-23 14:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8ab825858329f986f4b65a27cd18e23c SHA-1: a80765df5a45e8c1e2f46b4618062eb906aa7a62 SHA-256: b72fb8338fb68eeb95d154a74b970779d95c4134b341e404f9d49ba9ffe6db61
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of embedded URLs and the structure of the PDF, which appears to be generated by wkhtmltopdf, further support its use as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=canon+922+print+head+removal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407733/normal_601e56eb98abe.pdfIn PDF document text
    • http://chambre.xyz/14059798385f9vu4.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/jerawisusawefi.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/5jNThbR/21790091272.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/hajbjfW/81815820133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_600a9dd0cde3f.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/tinufefatexaga.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/higjcjj/srso4_ions_present.pdfIn PDF document text
    • https://sarajifig.weebly.com/uploads/1/3/2/7/132710715/mejusibi_watik_xulirowod_wibox.pdfIn PDF document text
    • http://copyrightproblem.com/does_usps_international_first_class_have_trackingb8ei6.pdfIn PDF document text
    • https://lipulutopokun.weebly.com/uploads/1/3/5/9/135964399/fumaze.pdfIn PDF document text
    • http://playmarket-online.com/automaton_transfusion_full_movie5j7f5.pdfIn PDF document text
    • https://fivarebaxuru.weebly.com/uploads/1/3/5/3/135326201/5606539.pdfIn PDF document text
    • http://civiliscmq.online/borknagar_true_north_megau0ehz.pdfIn PDF document text
    • http://guvizaw.22web.org/8189444087.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/romeo_and_juliet_study_guide_answers.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/xedizalovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_601e6fc013dcf.pdfIn PDF document text
    • https://nofawukamo.weebly.com/uploads/1/3/5/3/135347109/sibuzeme.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/ratozus.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/ep80UuS/best_comic_drawing_app_ipad_pro.pdfIn PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/likamusu.pdfIn PDF document text
    • http://creamwalls.online/juxirezosin7gsy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wazajimebal.epizy.com/gps_area_calculator_app_android.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_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 5272 bytes
SHA-256: 72b426eb283a1e0a358aeb72598b0d3d3dba29e84314436334c8d629940f4855
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 11308 bytes
SHA-256: ca54e2a987db703504f9fef219d561fdf4724c41010348726354d36aecbca359