Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc0bb7e5b3377a6…

MALICIOUS

PDF

97.9 KB Created: 2021-09-01 23:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a6e69ef49d7be2a91a6fd9ab8ce151d1 SHA-1: 2bfb6c95888a6945ca204797aee48e0f7c1839b3 SHA-256: 0dc0bb7e5b3377a6f7765c25b506b34eae297858b58ab77a481f7492a1f2118b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, for malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document attempts to trick users with fake financial instructions. Numerous URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://runo34.ru/attachments/file/13247085054.pdf In PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/32816861832.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/xudozineviso.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2cf13e5285df56094c39de5de829fadc/sepoxaxezumidabuwuroxu.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/jegopebedogupajidonuxi.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/pogeganofodumedafe.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/647f84ce1a3b1a07dc0f05f85971f2a8/bugeragok.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/lmrlim6d1lnicb3dh3hvbfm2n1/16334449948.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/nedajotajala.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160714d52232fd---fazixanejewuzowubisagopek.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088327700180---nadutefimawaruzezamuda.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/metagawemivo.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160db768126543---77524636687.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/witulapeniti.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/jopeduwer.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/26684889915.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bb0f3efdf28d2c16a4f323ba10876210/wutinizunowigar.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/2758159321.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/93325844799.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/2muso7fma1h5giq10cloe9jrq3/mozidawagojigaja.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/wowusatijodojij.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/63570560065.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/58548422865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=when+you+broke+me+firstPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001336f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336F 10708 bytes
SHA-256: 15502ca370d6472d75e7e294eb4aa14d12cc2fa6d6b072682b7a34851fb08204
font_02_sfnt_off00014bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDB 17568 bytes
SHA-256: 5df7521a8abd2b48e6346506d0ab398966d92cdaa17544154a8a8804bc2f4850