Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d0ef962cd68de7…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 06:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c27ba1dea523c2c96c76cbb86228dc51 SHA-1: eeea2a78c567d8cf111a890276e39b16649ef76e SHA-256: 54d0ef962cd68de7b2da7d81078775397edfbe7305a1dd72c3d9907085022f5c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The embedded URL 'https://xajibur.ru/award?keyword=naive+bayes+classifier+algorithm+pdf' suggests a phishing or scam attempt by luring users with a seemingly relevant document title. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7280

Heuristics 4

  • 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 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=naive+bayes+classifier+algorithm+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379030/normal_6026346157c20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fcbb0c407d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5fd61f6c4f72d.pdfIn PDF document text
    • http://irisca.online/vududadewutanewetikuxap3asj.pdfIn PDF document text
    • http://geesecam.com/how_to_hard_reset_polaroid_tablet_to_factory_settings5k80m.pdfIn PDF document text
    • http://avtoshkola-region26.ru/how_to_replace_a_galaxy_s5_batterytzjb1.pdfIn PDF document text
    • http://mivetys.xyz/how_to_manually_update_kindle_touch_4th_generation8jef6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fcb187d3a36d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_6031294852f51.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/hp_laserjet_1012_not_printing_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203e52d0-eae9-46fe-80d7-86bd75002074/maths_crossword_puzzles_for_class_10_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a0e110-8ad6-4dd5-91e9-379ccf7529a3/54511780586.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/lanuramajaken.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/mumutazomiketi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f766a44e-de6e-4671-8f2f-ff16a2487a40/beats_solo_2_wireless_one_side_not_working_on_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/85899707204.pdfIn PDF document text

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