Malicious PDF — malware analysis report

Static analysis result for SHA-256 407e3fedadb7c855…

MALICIOUS

PDF

77.5 KB Created: 2021-04-07 19:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 404319d96b8c49748e336def78c016dc SHA-1: dd6ac531c6f3810b9bc953749650bc2b442a4311 SHA-256: 407e3fedadb7c855bf42bf6d12ee03efe5a2b633845f1a9ac2b8e3eee2bc1005
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a search result. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/award?keyword=auditing+vs+accounting+pdf
    • https://cdn.sqhk.co/gejixoneku/UnREXjg/narakoxexe.pdf
    • http://xuroriwonufuz.scienceontheweb.net/ame_dicionrio_de_administrao_de_medicamentos_na_enfermagem.pdf
    • http://smartroom.pro/where_can_i_give_toys_to_charity_near_meyf8lm.pdf
    • http://bristol-yalta.run/bible_niv_or_kjvsoaxk.pdf
    • http://gumidaz.medianewsonline.com/civic_engagement_definition.pdf
    • http://gunenekaroz.mypressonline.com/brahman_granth_download.pdf
    • https://cdn.sqhk.co/tijanukubo/fhcjihc/37027860905.pdf
    • http://swiss-gear.store/convert_pc_power_supply_into_a_car_battery_chargerixi20.pdf
    • http://therarbooks.com/ghost_rider_rookie_card_value0lfuo.pdf
    • http://xafopawiki.medianewsonline.com/fijovofato.pdf
    • https://cdn.sqhk.co/wovenebi/hjchfgj/english_songs_mp3_download_sites_free.pdf
    • https://cdn.sqhk.co/guvevifowo/iegcWjj/28341314633.pdf
    • http://espacecmb.xyz/new_moon_february_2021hjng3.pdf
    • https://cdn.sqhk.co/pigajifaw/xgckKUk/gacha_life_club_wallpaper_hd_2021.pdf
    • http://jewogipuwivi.medianewsonline.com/gurixike.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufuzewasi/manobu.pdf
    • https://2108ee29-f41f-4224-afb3-8e24ca2f7712.filesusr.com/ugd/279473_981df64c762a4f83bfa8f506e7edb461.pdf?index=true
    • https://s3.amazonaws.com/viromibukoleliw/37307391500.pdf
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_b1fd73aef7c04904b2a16740d1e28feb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7deade30-ce97-4235-9fee-9de70224e349/what_does_the_coffee_grim_offers_max_symbolize.pdf
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_8054b8bfbf504491bf997826144ab14d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ea58377-02f5-4444-bdbb-17803b12246b/fender_fm212_dsp_review.pdf
    • https://uploads.strikinglycdn.com/files/43203beb-c40d-416e-8b6d-0da86df40ff9/brownie_hiker_badge_requirements.pdf
    • https://uploads.strikinglycdn.com/files/a433c537-2a26-47ff-b262-373f0ca259e6/kuzasavev.pdf
    • https://uploads.strikinglycdn.com/files/522ba254-ecba-49c7-addc-b929061f2b78/stihl_string_trimmer_prices.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/zivijipafapokawuji.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_off0000f1e1.bin
b8a95e1365c8ead549e598402855687f84e39c30a9de0d4659e862be478cbce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 5244 bytes
font_01_sfnt_off000103e2.bin
66b153f860179c8cc6ff63eacd198e3c21265d50be7966c92c0a86fa99c6b522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 11000 bytes

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