Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff353c1cbd72c5de…

MALICIOUS

PDF

61.3 KB Created: 2021-02-25 01:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 392cb856e1f3646c5636549fc8f18bdc SHA-1: 7cc2ecc6f057dbe1f95633c4f7eef80409a5bc2c SHA-256: ff353c1cbd72c5decd42cad83d31fd70e8df56b2aa9813091180c4f7de8b73e2
124 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is described as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the primary threat appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9522

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://druttle.ru/award?keyword=do+chrysanthemums+self+seed PDF link annotation
    • https://cdn.sqhk.co/zujijivopuju/HXiihjc/78548737440.pdfIn PDF document text
    • http://strongcreditscore.info/costco_cake_order_form_2020qjqxu.pdfIn PDF document text
    • http://wow50.pro/fovewus3e57.pdfIn PDF document text
    • https://cdn.sqhk.co/pododefakes/egqif2t/watch_disney_plus_with_friends_online.pdfIn PDF document text
    • http://datab.vip/35995200873e2fk4.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/hhheDjh/63869943512.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/g10f8ib/suwuvamilelodusabo.pdfIn PDF document text
    • http://raifaisentapp.online/muxigokxz58.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/hatjfje/all_star_celebrity_basketball_players_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/cpsigqR/60988843745.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/hr8fdnr/merge_magic_challenge_16_help.pdfIn PDF document text
    • http://criticcxck.space/evangelio_prohibido_de_judasrqi40.pdfIn PDF document text
    • http://skidki-day.shop/ready_made_projects_for_electronics_and_communicationz172f.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/JFjcjfi/95771305681.pdfIn PDF document text
    • http://govezijatin.rf.gd/how_to_descale_a_keurig_k400_series.pdfIn PDF document text
    • http://gemesiwexalizel.epizy.com/computer_science_net_exam_books_free.pdfIn PDF document text

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