Malicious PDF — malware analysis report

Static analysis result for SHA-256 d766b5f307247ba3…

MALICIOUS

PDF

38.0 KB Created: 2021-04-01 02:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1592fece012a0cb76148dfc86d5568bb SHA-1: 47da9db982581676fc22b24c7ced431d90e85e9e SHA-256: d766b5f307247ba39a1ecae80f8e296a3f2c0f5bbd324220a11ebd72e362f218
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a phishing lure, presenting a screenshot to obscure clickable links. It contains numerous links to external PDF files, with a critical finding indicating a link to known malicious redirector infrastructure. The document's structure and the presence of multiple SEO-optimized PDF links suggest an attempt to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6767

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.
  • 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://yafferge.ru/award?keyword=11th+physics+refraction+of+light+pdf
    • http://tawiwadebez.iblogger.org/luludeziba.pdf
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/zesena.pdf
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/43b58ac2f2aea.pdf
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/4b344ee60.pdf
    • http://legujepug.22web.org/how_to_use_a_dr_brown_bottle_warmer.pdf
    • https://pafukonogoxaxe.weebly.com/uploads/1/3/1/4/131437157/1742581.pdf
    • https://xisisaxukuvapun.weebly.com/uploads/1/3/4/6/134659200/54d837.pdf
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_2303686dcf6e4da894b467c732dcf172.pdf?index=true
    • http://mafevokok.rf.gd/298637816.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_a968c59235744feeb4902cd45aeae958.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b5aeabbf-e68f-463f-9679-b15b7975a51d/how_do_you_reset_the_time_on_a_shark_watch.pdf
    • https://uploads.strikinglycdn.com/files/0a5ade98-6762-46af-b0bb-30cb97e9a3f2/manelukonobu.pdf

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