Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f159bd36130b287…

MALICIOUS

PDF

75.3 KB Created: 2021-04-14 00:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53d54339c950754cd687591f542166ec SHA-1: d1ae9c82387d92831327c2ff36365d65a2f267f3 SHA-256: 5f159bd36130b2875abea66996096408a149d41fd98c847fcd18a0b87e569746
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs, one of which, 'https://vilenefex.ru/strik?utm_term=why+my+tv+screen+is+black', is directly associated with a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of multiple unknown URLs suggests a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://vilenefex.ru/strik?utm_term=why+my+tv+screen+is+black
    • http://idealica-official-it.website/sling_drift_unblocked_76cw9y1.pdf
    • http://hargotel.xyz/attributional_style_scale6prrv.pdf
    • http://youtube-subscribes.com/psychology_the_science_of_mind_and_behaviour_4en9a0z.pdf
    • https://cdn-cms.f-static.net/uploads/4478947/normal_6026ddace2972.pdf
    • https://static.s123-cdn-static.com/uploads/4406456/normal_6004a468af11e.pdf
    • https://cdn-cms.f-static.net/uploads/4471238/normal_6046f98d0adfe.pdf
    • https://cdn-cms.f-static.net/uploads/4373261/normal_6012f782df3d4.pdf
    • http://compte-cmbretagne.best/the_csep_study_guide_for_seh_v49vf9g.pdf
    • http://airned.ru/nirogururiraroloxuznuu8w.pdf
    • http://opticsystem.website/miocardiopatia_dilatada_etiologiamg2yx.pdf
    • https://cdn-cms.f-static.net/uploads/4427820/normal_606a3cb6c06c7.pdf
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60483446d1610.pdf
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5fcd9c0636d13.pdf
    • http://cetakchantek.com/flexible_dieting_lifestyle_recipes_redditknc86.pdf
    • http://peuer.xyz/remote_control_urc-8820-ciscoayn95.pdf
    • http://yoptan.space/92142777718shhum.pdf
    • http://update-win20.online/rapexewabaluvelorefeji9hj.pdf
    • https://cdn-cms.f-static.net/uploads/4418973/normal_60603b4ba338f.pdf
    • https://static.s123-cdn-static.com/uploads/4410956/normal_5ffdbfc5d6ffd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7f483e22-bb74-4088-8938-f45c95a7ecb5/what_to_eat_on_the_advocare_10_day_cleanse.pdf
    • https://uploads.strikinglycdn.com/files/f813d035-6bf2-4dba-acbd-b20bd9d5d42d/xagosinigifijugaja.pdf
    • https://uploads.strikinglycdn.com/files/44672e47-7a69-4ba5-9d06-561b6fe3e59b/petoxabonobuti.pdf
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_1627f7e1cd82466ea0509c8bcbe34424.pdf?index=true
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_8da0bb97bbb6431d834976a13e07d0cb.pdf?index=true
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_90999886ec514931a8bf1832216e3720.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e882.bin
425e282f4ed8751a9ce6cee0111933b55e1cf6abcb3ae027b460357b3f80c783		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 5416 bytes
font_01_sfnt_off0000fadc.bin
7a248b9d1a4f136b7706282402fa17d12c307041eb4bcf6ee81e3b233582d19d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 10808 bytes

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