Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a83e295ffe25b7…

MALICIOUS

PDF

46.2 KB Created: 2021-03-25 05:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e08191a632c6622662fc9a244441ae94 SHA-1: cc42fe82d0028dce05b3e8b5e9839b979e3ebab6 SHA-256: f1a83e295ffe25b71224630843f2276ec06f211487bf6db2c9eefa6ecc86da52
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. The ClamAV detection and numerous external URLs, including one on a suspicious domain (baarspo.ru), further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it likely contains embedded JavaScript or actions to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4131

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 46 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://baarspo.ru/award?keyword=funcion+del+pancreas+endocrino+pdf
    • http://gudokav.sportsontheweb.net/structure_of_saturated_fatty_acid.pdf
    • http://delinapod.mypressonline.com/bogawevigokuxejit.pdf
    • http://igonlinesupport.com/lowrance_hook_3x_transducer_installation505jj.pdf
    • https://static.s123-cdn-static.com/uploads/4505358/normal_5ff3c1fbe1f22.pdf
    • https://cdn-cms.f-static.net/uploads/4459777/normal_605c00fd3dbd0.pdf
    • http://dapajurop.mygamesonline.org/sennheiser_ew_100_eng_g4_wireless_camera_lavalier.pdf
    • https://cdn-cms.f-static.net/uploads/4367925/normal_60461485b4827.pdf
    • https://uploads.strikinglycdn.com/files/99c31612-1dbd-4ea4-acf0-f4dd0e17ddea/85001526159.pdf
    • https://uploads.strikinglycdn.com/files/09e310cd-1f83-47f3-8a83-9beac7673e3c/how_much_for_casio_watch.pdf
    • http://tuxolemoga.epizy.com/yield_return_vs_list_performance.pdf
    • http://filazit.epizy.com/halo_reach_pc_game_highly_compressed.pdf

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