Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffe57496afe6040…

MALICIOUS

PDF

87.8 KB Created: 2021-06-26 17:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a6b8bdbfb402e151926418796d5a50f9 SHA-1: bd638f94171aa04a078929e0fe7eabeee3ba66d1 SHA-256: bffe57496afe6040ca351da418c58eca43c308b94f9fef6c8e8cdf38d9d0e985
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/uplcv?utm_term=wto+agreement+pdf PDF link annotation
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfa5d85b36---xumerijoka.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/mogilebuxuvagivogufudo.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/dubijobadudijupez.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/67831906139.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/a72b2ac8899b791859e34e37d7d8eaa2/91830722185.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16c620be4b---kifowomileku.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/remumotafimuwotinarixu.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/13601752197.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/65883635206.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c5ee12224---66042223472.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-6-10/20210610200005760064.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b45c32b73b8---gopipojesanaz.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/75217ea0b122f3e878a3ed1c14d6bbdc/tamafapewudivibejodi.pdfIn PDF document text
    • http://charivne.info/images/file/buxinunu.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a116aed4e2---wubumimol.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/wabomidupurukitamofeje.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/cl2s6oi95a9d8072c6q293kgt1/51144930150.pdfIn PDF document text
    • https://businesslife.com/content/file/63105473040.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ba19f256---jofezakizalujefekudu.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1609461a2d6895---zuxesenovanopo.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608759708052d---fukukufujisuvojed.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/23794743058.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/vomegeruwikafadi.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_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 10528 bytes
SHA-256: 1b4fbad78306f0d975e6a4a7b0573050dd21b9bb1c88c2d0bfb7742baeb2c05a
font_02_sfnt_off000126b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B0 16728 bytes
SHA-256: fd2070c739327f00f6261f1e6bb3707708edb36b0b8b3511d799d1dfd035b2b8

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