Malicious PDF — malware analysis report

Static analysis result for SHA-256 634ab73c54f3dbee…

MALICIOUS

PDF

46.1 KB Created: 2021-03-23 16:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5398f3dff06df6e2469e0868dfc1ba3a SHA-1: 3921729be15646c7058d5c488713d0864a2f8012 SHA-256: 634ab73c54f3dbee13ee1e56edc4f97be293b3a9f4b6f9e20b78115cd941b433
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and it contains multiple embedded URLs pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs strongly suggests the document's purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8552

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=cardiologia+pediatrica+diaz+gongora+pdf PDF link annotation
    • http://adminhalil.com/mafodufitigadomvlbnw.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/98a36eb2e63.pdfIn PDF document text
    • http://clipshd.design/monster_500ml_energysoqn9.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/yjhfBjf/89608111344.pdfIn PDF document text
    • http://apsdd54gfv.xyz/nizufosulosrs0rv.pdfIn PDF document text
    • https://nililekekikare.weebly.com/uploads/1/3/0/7/130739967/sirobufemilawon.pdfIn PDF document text
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/zawej-keramo-zogumivelelu.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/Wkibyds/man_booker_prize_2019_winner_date.pdfIn PDF document text
    • http://cashbackk.site/how_to_be_a_good_pastors_wifemtfs7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f07391-b8e2-4e90-ac04-c5a4610003d2/blank_emotion_wheel_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e166d1d-5d98-48ec-8db3-8d6052c59508/misitoboluxojubafan.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/akhisarspor_forma_fiyatlar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e690e9-0515-4a41-9ba3-a595e2bc18ca/21921851887.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/glencoe_geometry_1-_5_skills_practice_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54433252-5e43-4452-ba1b-d4f0542e87cb/43830754265.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bottom_navigation_in_android_github.pdfIn PDF document text
    • http://daxotumolurotaw.rf.gd/rounded_border_textview_android.pdfIn PDF document text
    • http://jidofadar.rf.gd/dewirapagilodofebopotok.pdfIn PDF document text

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