Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da97cecc4ca29ac…

MALICIOUS

PDF

79.2 KB Created: 2021-03-19 11:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137e2930cc709e3fc8fabee0d166bdc9 SHA-1: de37a204312591a4ee007e112958a92f2e44c733 SHA-256: 2da97cecc4ca29ace784e2215b92ba223292afe066dc8caedcb89b5c5f6d52c1
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary one being zajinet.ru, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into clicking on a link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://zajinet.ru/award?keyword=attribution+theory+pdf+2020
    • http://texno3ua.com/tedenuxupmsp.pdf
    • https://cdn.sqhk.co/togokitaz/hguiiAg/royal_family_members_news.pdf
    • http://taygerr.com/aquatic_adaptation_in_birds_and_mammalsxsf36.pdf
    • http://intekzafast.online/294171883303kirx.pdf
    • http://in-step.shop/sukesitozilor3i0o.pdf
    • https://cdn.sqhk.co/reromiwo/ggwij8v/mix_app_free_download.pdf
    • https://cdn.sqhk.co/rivinodati/idvpTmU/madness_combat_project_nexus_2_steam.pdf
    • https://cdn.sqhk.co/xufatirumina/gjcrIus/gunivorexuvidisadigexafe.pdf
    • http://custits.space/mavarijokaguketetgww0w.pdf
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5fefd3e899695.pdf
    • https://static.s123-cdn-static.com/uploads/4385026/normal_5feb3f9336479.pdf
    • http://bestpriceforukraine.xyz/mibatisevuseniropoxegirimfq4th.pdf
    • https://cdn.sqhk.co/kagelemovo/cXhbwgd/marketplace_cars_for_sale_perth.pdf
    • https://cdn.sqhk.co/xidatelo/fibfjiK/whispering_angel_price_usa.pdf
    • https://cdn-cms.f-static.net/uploads/4381546/normal_60401b492699d.pdf
    • https://cdn-cms.f-static.net/uploads/4417049/normal_6010ee99c16e4.pdf
    • https://cdn.sqhk.co/gajamomol/jigi0hh/25712096695.pdf
    • https://cdn.sqhk.co/jenireni/ijidbij/dragon_city_hack_game_guardian_mod_menu_2020.pdf
    • https://cdn.sqhk.co/faruvate/1x9jb72/68430113734.pdf
    • http://yildirimotobursa.com/eclipse_free_for_ubuntu_14._04xcxv3.pdf
    • https://cdn.sqhk.co/detaludolef/aibgfhg/96012011025.pdf
    • http://load-bcp.com/free_survival_games_pc_no_downloadbjfd5.pdf
    • https://static.s123-cdn-static.com/uploads/4466662/normal_5fc9db34daee8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nitirew/can_the_dash_diet_lower_blood_pressure.pdf
    • https://s3.amazonaws.com/midizaxopazeji/chithi_na_koi_sandesh_new_song.pdf
    • https://s3.amazonaws.com/tuletivotarupu/battlefield_5_beta_ps4_not_ing.pdf
    • https://s3.amazonaws.com/remavuj/77339669944.pdf
    • https://s3.amazonaws.com/fusopoxipo/sony_android_tv_49_inch_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed13.bin
2c5d05a4e37b66273be585f7cab89418642b6233a3c9ffa33ed26aa4c008e15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 5096 bytes
font_01_sfnt_off0000fe66.bin
73e4d75723ad2cd6eab080887ec25cc04f644c1dfd0386d4a1790cb67edb99ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 10180 bytes
font_02_sfnt_off0001212e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 4324 bytes

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