Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e23520a0d47b150…

MALICIOUS

PDF

84.4 KB Created: 2021-01-26 18:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 991920ff66d316ae58c596ea2cba2f02 SHA-1: 245a4bd8a7576feac4a2358b50414f1497aae0d2 SHA-256: 0e23520a0d47b150cd12aa972deb6d954fc665bc7e7a3d5ab25c4bf5107e402d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded document body, though heavily obfuscated, suggests a lure related to 'literary devices'. The primary IOC is the external URL, which likely leads to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and heuristics point towards a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=literary+devices+in+the+color+purple PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4531626/normal_6002ffa415b2c.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/jegjyih/radio_super_folk_104._7_fm_en_vivo.pdfIn PDF document text
    • http://chebsvet.ru/rocketman_full_movie_free_to_watch6m5x3.pdfIn PDF document text
    • https://cdn.sqhk.co/nomowaxiwo/chc4Mid/world_series_champions_dodgers_hat.pdfIn PDF document text
    • http://lovelyhouse.online/hd_wallpapers_1920x1080_anime3hx2b.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/jgiatij/tubi_apple_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_6006f8a14a08a.pdfIn PDF document text
    • http://pycnidwzxc.info/neburapodubu3th4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5ff261f54eaf2.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/8VlXvji/maternal_instinct_lifetime_movie_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/TPNYgeQ/talking_tom_gold_run_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/jdtRiaH/dead_by_daylight_ps4_age_rating.pdfIn PDF document text
    • https://cdn.sqhk.co/kafevinuva/qjbxhd1/pixel_petz_discord_server.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jhChjj3/toy_airplane_flight_simulator_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/iE8nt76/bollywood_party_songs_2019_mp3_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7F 5264 bytes
SHA-256: 28f7fb5c3057d7ca8a12473c9c247fa3a20762d952ccfb4ebbec81207b4991cf
font_01_sfnt_off00012070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 10612 bytes
SHA-256: f177e43ca465cb7e93fdcfc4df742ce69c44081d64ac0d168d72e01850504dad

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