Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d5a1257d6b5249…

MALICIOUS

PDF

94.3 KB Created: 2021-03-17 11:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0a58487524c07918c9a55637960928fb SHA-1: 2d6543e80f60ef0ba0719155856e6698b67ee3ab SHA-256: 47d5a1257d6b524919807da77edd1ed16e6141989c74b4d58d6f272c75e40bc7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to aquaculture and the authoring application, which are likely used to disguise the malicious intent. The presence of embedded URLs and the heuristic indicating a link farm strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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://dugedepap.ru/award?keyword=monoculture+in+aquaculture+pdf PDF link annotation
    • http://pubggaming.online/86321582686l3nn9.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/honda_9.9_outboard_repair_manual.pdfIn PDF document text
    • http://haifaiv.ru/ludugurabefafomajutalatoxv9jyu.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/is_there_a_way_to_remotely_reset_a_router.pdfIn PDF document text
    • http://vizionsmc.net/pomiwedopcmquq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_602ab57a6b049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fe6131c3137d.pdfIn PDF document text
    • http://hocostyle.ru/how_to_remove_radio_2010_town_and_country9t1wt.pdfIn PDF document text
    • http://cryogen.me/t_galleria_by_dfs_angkorec32p.pdfIn PDF document text
    • http://tisigetid.iblogger.org/colosseum_audio_video_guide_worth_it.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/tupemb9hrv.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/bose_companion_3_series_ii_review.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/17077741103.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/zen_in_the_art_of_archery_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/bissell_powerfresh_steam_mop_warranty.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/22700412817.pdfIn PDF document text
    • http://revisinek.epizy.com/how_long_for_bodybuilding_to_see_results.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/formal_immediate_resignation_letter_template.pdfIn PDF document text
    • http://vumebef.epizy.com/viwimotasijavivo.pdfIn PDF document text

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