Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b5780fac7e9f9c…

MALICIOUS

PDF

37.8 KB Created: 2021-03-05 02:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d7dada5eb09f7742ee177e2478e7dc64 SHA-1: a0e13a1f1bdd34fa77287a61e7815d46d7c20b9d SHA-256: 03b5780fac7e9f9c63f3146b243bc31b35f103e0119d77bfc1f3e8505d8e144f
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its structure, containing an image and a single clickable link. The embedded URL, https://xajibur.ru/strik?utm_term=can+cortisone+shot+cause+sleeplessness, is the primary indicator of malicious intent. ClamAV detection further supports the malicious classification, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6482

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 37 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/strik?utm_term=can+cortisone+shot+cause+sleeplessness PDF link annotation
    • https://vusugurubem.weebly.com/uploads/1/3/0/9/130969976/062106300429.pdfIn PDF document text
    • http://detonic-ufficiale.website/how_old_were_the_harry_potter_cast_when_they_started_filminghql9g.pdfIn PDF document text
    • https://fabidarupevonu.weebly.com/uploads/1/3/4/6/134620419/wisewosalo-suxuzuxeka.pdfIn PDF document text
    • https://jabiwubebawa.weebly.com/uploads/1/3/4/3/134365468/2028136.pdfIn PDF document text
    • http://getsalle.xyz/suxijaniraxuvexm060f.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/644168.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_335fd30b26a14727a232deb610661717.pdf?index=trueIn PDF document text
    • http://nidudovuj.epizy.com/leaflet_template_word.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_dcdf5a9a9f094c9f9765af8bc25f8258.pdf?index=trueIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_c3933a9177054d158479030b97522253.pdf?index=trueIn PDF document text

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