Malicious PDF — malware analysis report

Static analysis result for SHA-256 367e1ce380c9ece3…

MALICIOUS

PDF

92.6 KB Created: 2021-01-09 22:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 84df096b2abdb4f42e237997b0035e15 SHA-1: 6712aeec95f149e38c089673aaa228945bf75a7c SHA-256: 367e1ce380c9ece3c53a6d4381224eb65e2232a28a77297f8b1275813f397f40
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicative of a link farm or phishing operation. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'aeronautical engineering'. The primary attack pattern involves directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8735

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
  • 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
  • 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://traffnew.ru/aws?utm_term=formal+definition+of+aeronautical+engineering PDF link annotation
    • https://cdn.sqhk.co/zodenizekija/sifIagg/gikuw.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/zejinuru_wotenanogi_bowisezamapegap.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/idNgeKa/72240693392.pdfIn PDF document text
    • https://site-1166616.mozfiles.com/files/1166616/labizedoxuwugus.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/UFVihS9/jitivibavize.pdfIn PDF document text
    • https://site-1180945.mozfiles.com/files/1180945/the_inner_world_of_the_immigrant_child.pdfIn PDF document text
    • https://site-1215102.mozfiles.com/files/1215102/woxitozesusem.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/dopikikiz_waretevidegidim_bawix.pdfIn PDF document text
    • https://site-1168117.mozfiles.com/files/1168117/80870630887.pdfIn PDF document text
    • https://lolusegixasuvar.weebly.com/uploads/1/3/4/7/134770702/4a0b9b02.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/juPmihA/trendy_hair_salons_chicago.pdfIn PDF document text
    • https://site-1171749.mozfiles.com/files/1171749/zepoginomajaje.pdfIn PDF document text

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