Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62d6c59d2459727…

MALICIOUS

PDF

80.7 KB Created: 2021-06-08 09:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7608583f33a7d4a7f96c208121477dc SHA-1: d79297ff4226a2623870d1c6ddb7ad68139b600e SHA-256: a62d6c59d2459727be8f3d16ae64fd26249616176c162f407aaa8ca9589722f4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary ones pointing to disposable hosting and a domain known for distributing malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially untrusted domains, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://inwebjor.ru/pbw?utm_term=les+d%25C3%25A9terminants+cm2+pdf
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/1c15fa9fea0a5.pdf
    • https://levonosaxedose.weebly.com/uploads/1/3/2/6/132695543/zenafipufeligow.pdf
    • https://cdn-cms.f-static.net/uploads/4380211/normal_601af7cb01d36.pdf
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5ffd2d92be9d2.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nipekari.pbworks.com/w/file/fetch/144554703/14172926385.pdf
    • http://ruwomodanom.pbworks.com/w/file/fetch/144446832/facebook_marketplace_ct_cars.pdf
    • http://rorazokazog.pbworks.com/w/file/fetch/144557202/who_killed_ohma_tokita_master.pdf
    • http://pigedigasexu.pbworks.com/f/dude_theft_wars_mod_apk_download_an1.pdf
    • http://lufokomarib.pbworks.com/f/how_do_you_use_a_tens_unit_for_sciatica.pdf
    • https://uploads.strikinglycdn.com/files/0c2ed2bf-d614-4f3e-a004-8a1439f374e1/95883658606.pdf
    • http://bepisoxu.pbworks.com/w/file/fetch/144439395/how_to_write_a_letter_to_disconnect_telephone_line.pdf
    • https://uploads.strikinglycdn.com/files/eac5dfc6-0727-46ec-82fa-60684ee1e325/30133549914.pdf
    • http://sodopateduke.pbworks.com/f/adobe_animate_2020_system_requirements.pdf
    • https://uploads.strikinglycdn.com/files/c3d90900-455a-48c6-ac66-3634b8b36bcb/fawuvutivuliwokolataz.pdf
    • http://jojekepodef.pbworks.com/f/jepikigadekilapesega.pdf
    • http://nuxawakaxaz.pbworks.com/f/72729682020.pdf
    • https://uploads.strikinglycdn.com/files/d54ebacd-3e21-4a3c-9832-b57a0bbed256/60111384511.pdf
    • http://vajaxasave.pbworks.com/f/heather_piano_sheet_music_hard.pdf
    • http://juzifezazuk.pbworks.com/w/file/fetch/144806757/metodologia_de_la_investigacion_juridica_en_el_siglo_xxi.pdf
    • http://xetibubib.pbworks.com/w/file/fetch/144411810/astrologa_y_numerologia.pdf
    • http://dipoziw.pbworks.com/f/how_to_file_self_employment_unemployment_insurance.pdf
    • http://dusozivelas.pbworks.com/f/46050875736.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c5.bin
192e9d533813016a4e0c1bdb71cadcb8b9c4887b6438c1ff1c773a8132389105		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 1604 bytes
font_01_sfnt_off0000ece9.bin
5a6ba6fb6d34fccdf38890d7ced0c6e71b998291643ae7eabacca7facc2b4516		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 5160 bytes
font_02_sfnt_off0000fe12.bin
4958af6f6106be99d4fc1461381a96db7b8ddb39d8bbc9052c6f6f2f9bc97dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 12240 bytes
font_03_sfnt_off0001251b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 4324 bytes

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