Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c8343cbb41947e…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 01:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7f55d855f7b93e34423983f62114fe1 SHA-1: 4264aeee890a999eaff17dbf7a653a52b1be1c87 SHA-256: f6c8343cbb41947e39f8ed67e068559a6839580fab8f02bb5e0022bc485225f4
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing an 'apostille texas form pdf', suggesting a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the nature of the detected threat point towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://pelibifir.ru/award?keyword=apostille+texas+form+pdf
    • http://chempion.coffee/what_is_project_zorgo_leader_namebg9mf.pdf
    • https://cdn.sqhk.co/tukawezezo/ifXigtf/44602230821.pdf
    • http://mritzoliver.design/auriculoterapia_puntos_maestros_chinoslbaqf.pdf
    • https://cdn.sqhk.co/visesefider/5iAhi34/evil_horror_monsters_2.pdf
    • http://hot-money.fun/nawobci1ze.pdf
    • https://cdn.sqhk.co/fefuxumito/5DEUXRB/19717461997.pdf
    • http://theplafond.xyz/how_to_cook_a_steak_on_a_char_broil_infrared_grill5x35r.pdf
    • http://azules.ru/que_pena_tu_bodahqg6m.pdf
    • https://cdn.sqhk.co/pimidima/jfjdjdj/overkill_3_game_download_uptodown.pdf
    • https://cdn.sqhk.co/famazipow/AjeaUF4/79459660685.pdf
    • http://tonojodozif.mypressonline.com/lonekav.pdf
    • http://redtea.space/bissell_proheat_2x_revolution_pet_pro_does_it_vacuumt4ul6.pdf
    • https://cdn.sqhk.co/xenivoronizu/gCE9gh2/the_alchemist_code_jp_news.pdf
    • https://cdn.sqhk.co/podidiwi/iheicie/free_google_chrome_offline_kuyhaa.pdf
    • https://cdn.sqhk.co/xexegapimuwi/qVXieij/turbo_dismount_2_unblocked.pdf
    • http://prod-fruit.space/xegojiselowl3v.pdf
    • https://cdn.sqhk.co/bujasugawo/ihhhjh4/xejujovomu.pdf
    • https://cdn.sqhk.co/zogameva/hhgfD1t/simozixitobe.pdf
    • http://mopowataxix.medianewsonline.com/41061730410.pdf
    • https://cdn.sqhk.co/jimevexir/ggEgijh/delated_wish_meaning_in_tamil.pdf
    • https://cdn.sqhk.co/nomelafu/ggqhdjd/chess_learning_books_free_download.pdf
    • https://cdn.sqhk.co/bomenojosa/cEz4EZM/zevapadafemolewebedexu.pdf
    • http://visionnew.xyz/pedominumetopeguxukinoka9djri.pdf
    • http://zuduwamani.mypressonline.com/what_can_a_parent_do_to_help_a_teenager_with_anxiety.pdf
    • https://cdn.sqhk.co/bobimugura/gyhdXfT/89265868870.pdf
    • https://cdn.sqhk.co/pasededi/gitqixv/lebara_phone_plans_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3f.bin
8c6eddce0887ccef8bddc0a7483cf5ce7b7c4a40ca13181149a3863bbdf43b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 5244 bytes
font_01_sfnt_off0000ff05.bin
4b50b2e4dbb07b8ef15f92cab9a04dfec7a26d574b95bacb793decf69a04d4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF05 10920 bytes

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