Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c02fb7b7f6d253d…

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 06:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3425fdaf3a915bc3972ab554bf93ee6d SHA-1: fd203b28b27b2613f256ff20f4a5cab5ec04408d SHA-256: 0c02fb7b7f6d253d03986c744bfca16afb16819e39d5a013887fefb6bc753b63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm on disposable hosting. The presence of these links suggests the document's primary purpose is to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://oniceh.ru/uplcv?utm_term=android+podcast+app+comparison PDF link annotation
    • https://greenfins-thailand.org/uploads/file/91730717436.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/jukivibezasutali.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/wafibovegubajaxon.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/wowaxozunujufuzagus.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/38028267360.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/aorc7cgmtq73olb1r86uar4f3p/risinowo.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ef9754066b443f0c615634a3db0a3fd7/94566729982.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/78045775522.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/dexiwutefarojol.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/5421900160.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/suzudupuwaj.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/jibizonaten.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/dogorisinuzonekisegupudi.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/3673043777.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/51f2fe703701a71ca6ac107bc5ec6178/59656889093.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/52408982317.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/55129819218.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/68mdker37n2gfnqsgv60lv3sn6/49985297132.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/96418755076.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/sexepovobukiziwu.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/bupuzesovamuvivowi.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/54261306568.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/pizukibabapu.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/xajapogugitiwepiw.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/65891656082.pdfIn PDF document text
    • http://domuran.pl/files/file/levuziranesolaruwijapepus.pdfIn 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://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_off0000b527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3E 10480 bytes
SHA-256: 99cbeb2f916139cded313fb5e140f47f7bdec06f48fbe2e600f4be57cc41b434
font_02_sfnt_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 14980 bytes
SHA-256: 03de2f659db00580c231a088428d163edf93bcbf0385392f1d9d38c60fce6d82

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