Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f5026778e274ae…

MALICIOUS

PDF

88.7 KB Created: 2021-08-17 16:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 409100f45d5c6823013172e813d6af2c SHA-1: 52b7f28c0c81e460eb3bfa3fa93509618bbfc4c4 SHA-256: 09f5026778e274ae8fa55ba3f5085e4288d76f4f4cb915f66ad9f776e52ea719
176 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics confirms the link farm nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://toshiba-center.ru/uploads/files/rizupalogimux.pdf In PDF document text
    • https://asthasupermarket.com/userfiles/file/76629325130.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/66749774489.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/cn59k3al05s4k92b0j8biotc34/sefusipib.pdfIn PDF document text
    • http://www.celso.org/download/51121914755.pdfIn PDF document text
    • http://robbes.nl/media/files/kizokam.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/wudopegoze.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/koletidejuganufu.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a36671753d8---54144743253.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/60494864261.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/razokabozile.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7c84ca4d5---4749503160.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/16efc9699130d4929fc961fbde5e1fb4/6649271440.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/1424970e35131fa035b484f5833243a2/gojorurajetobumewesesaki.pdfIn PDF document text
    • http://sivam.pl/files/file/18349116442.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/95098220986.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160740d5f5ea77---92264046570.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/xeximixovuguxek.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/sisajodesonexewexerela.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161091c19e4cdb---xubokugotawedupebarasiwuf.pdfPDF link annotation
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160834b76b9791---namuw.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843529e7d3a---bapijilizonojerefutebikax.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a78a10281952bf4d93545a02fce14a5a/48415436866.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0454a070a1---94984803251.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accd3625c90---ginud.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b1edce65abc9f9c3df6496edaa561608/65216669792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=nuty+pianino+dla+pocz%C4%85tkuj%C4%85cych+pdfPDF 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_off0000f408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF408 17980 bytes
SHA-256: fd2ccf87651270b09d5c6e52cc9d1f16b25dda95573967e82d1a526476227feb
font_01_sfnt_off000120cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E6 11028 bytes
SHA-256: 562bc6aaf9faae04dc5a85e050dd9f3e3367f7bdb328d1f049b99e617e60e0ef

Open this report in the interactive analyzer, or submit your own file for analysis.