Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90e2526cfc2991c…

MALICIOUS

PDF

74.8 KB Created: 2021-02-19 23:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff1df3d1d8ae57dcbc17f3f8af20235 SHA-1: 0f53493b7798f672e266dc20f2b4fe39cf134568 SHA-256: b90e2526cfc2991ccea34f576f40cf68fe15a76a7f36998fd39119a17d94a818
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, one of which is directly referenced in the document's metadata, suggesting a phishing or redirection attempt. The presence of PDF-specific heuristics further supports its classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=cobra+driver+2020+review
    • https://cdn.sqhk.co/vonixilavot/eiaZiju/exterior_house_painting_cost_bay_area.pdf
    • https://cdn-cms.f-static.net/uploads/4486192/normal_601fba79137d7.pdf
    • https://cdn.sqhk.co/babijuvawov/57WFijZ/xuruzeweb.pdf
    • https://sowobufujugazid.weebly.com/uploads/1/3/0/8/130873997/javaxewimer.pdf
    • https://cdn.sqhk.co/mekibekowufe/giYhdKr/smart_manager_download.pdf
    • https://cdn.sqhk.co/fenazijeguk/vjggdgy/offroad_lx_simulator_hack_mod_apk.pdf
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/6a566f88b168499.pdf
    • https://cdn.sqhk.co/towevefizub/hUiiPjf/runescape_penguin_points_calc.pdf
    • https://cdn.sqhk.co/nakunadubux/n6hehiV/linumatukonuluzos.pdf
    • http://legexenajulejof.iblogger.org/22976019521.pdf
    • https://cdn-cms.f-static.net/uploads/4384642/normal_6025dd5b91d7f.pdf
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/nolazerofe_gomowoninete_vajonirukirutum.pdf
    • https://cdn.sqhk.co/pevizopubok/aojhtAY/bo4_zombies_gun_unlock_levels.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gilebufamefaf.rf.gd/vlc_video_player_for_laptop.pdf
    • http://kobukapun.epizy.com/new_york_accent_pronunciation_guide.pdf
    • http://virojokezof.rf.gd/xuwab.pdf
    • 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_off0000e850.bin
769785b28b80b9a00def98804d8f6ba14540cf6bb5d9501589e573673253b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 5080 bytes
font_01_sfnt_off0000f9ae.bin
45659944c5c28bc7923657c9d178bc2f3e882434fc745426365990a4e46a03a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 10740 bytes

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