Malicious PDF — malware analysis report

Static analysis result for SHA-256 537463d7005f767a…

MALICIOUS

PDF

38.7 KB Created: 2021-03-09 21:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f50127ac1936ce404c9222c6182026c3 SHA-1: 60d22b3722bbac983370c2b69fc7c8369825b8a2 SHA-256: 537463d7005f767a8d476f007f013d5880bae4f8240651f62d1ed714d62362ae
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious, employing an image-based lure to disguise a clickable link. The embedded URL, https://xajibur.ru/award?keyword=calligraphy+book+pdf+free, is the primary indicator of a phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7335

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://xajibur.ru/award?keyword=calligraphy+book+pdf+free PDF link annotation
    • http://curvepreloved.com/57755252758pm5cx.pdfIn PDF document text
    • http://psychologyrelax.xyz/50783981136wu3gz.pdfIn PDF document text
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/dedezaduxozar_sepab_pibexub.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/dijoserenoja.pdfIn PDF document text
    • http://pubomotikevetu.22web.org/36321357782.pdfIn PDF document text
    • http://mumaposogataj.22web.org/physics_cutnell_and_johnson_8th_edition.pdfIn PDF document text
    • http://boevoenlp.com/91141969059s8t97.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49287390-f256-4ee0-a0b4-3cc0ad262cc5/what_is_the_best_workout_plan_app.pdfIn PDF document text
    • http://gadusevi.rf.gd/8832614876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3045eac7-ace7-49c0-af7f-ac296db4b32b/gizobozagawusosiravexob.pdfIn PDF document text
    • http://gapisamiwabu.epizy.com/how_to_crochet_for_beginners.pdfIn PDF document text
    • http://fazafof.rf.gd/65969451510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6878a145-c872-4926-928f-050e96d99f47/jewuvibuzuzide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c07c0ac-2569-4ffb-8049-89eaa0d97b67/45339210395.pdfIn PDF document text

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