Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e31683cb9cd9c0…

MALICIOUS

PDF

91.9 KB Created: 2021-07-01 09:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 824ff8e8c316268b45d38d5b46f5d755 SHA-1: f47b7592cdd3b72e606f433bc012d8aaad8e363f SHA-256: e7e31683cb9cd9c06fa55733a141c1051cfdacf9d6e3ec12c1216a5923b97cdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://catamma.ru/uplcv?utm_term=spice+plants+reading+answers PDF link annotation
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/116808f2e7d0891f1aa2c8d0235cb5f0/36351481830.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/55ed28125f34e70e4957fd4730a76016/50705715815.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/91013824639.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e19eab723---miwedadepelagisuve.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c93dce30d---zusodip.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/fulegot.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2c9fc7daf9710225f49ffc061dddffe4/lumifoxig.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9384c28248---zowipolazotagidemalo.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2bf11f9b6---51067183706.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0b5d8d285---zupabaluxabupim.pdfIn PDF document text
    • http://itfind.ru/uploads/file/debunefemogemizavaw.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/2ededd93b1c277bbd6e34f36f2bebf7a/posekop.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/53525056123.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/divetigikaviwupurimu.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/42879103588.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98b54e7762---finibirasokazaku.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/34949656037.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/0e4ce23a122b6d758b905923b4361d86/94014633824.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/8745291260a06df3a876c.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf10b6533c0---zitatedu.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/majobegekepus.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_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 17956 bytes
SHA-256: 4a2dbf21f93ad8a38e2ecd9cf57b3a0bc93066047e77b5d7242a6643d2b240fd
font_02_sfnt_off000149e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E1 10732 bytes
SHA-256: a5a9d1441d8ea9b18edac93b199edca02cb7b0e40487bd4f7af3a761a5415335

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