Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3a375782a779d6…

MALICIOUS

PDF

104.9 KB Created: 2021-06-27 09:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6ec1ed993a05fc5d106033d2ef0b9bee SHA-1: 0726217a9951bb544c3afba75c21deae04850a5c SHA-256: 7b3a375782a779d6add9fe8089e52d6885c5a04db33764d2030d61b91680c369
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other unknown hosts, likely for phishing or malware delivery. The PDF structure and embedded URLs suggest it's part of a campaign to exploit user trust by presenting deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/6ebd2b12606fe3310e5f713b8f3c6476/35772503704.pdf In PDF document text
    • http://gerocuki.hu/user/file/xogezezovowuk.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/numeroni.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/tudoragoli.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/807ft1k4q3ue987iq6bb7ei3i4/87844137108.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/vukizaro.pdfIn PDF document text
    • https://motacademy.it/file/72223372106.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/51069262fd3f69a7804fab1f57fc2f3d/16791456525.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9417ea8190---30438383768.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071a2af48c21---46596682280.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2bbfac217---fivetegiwakewuberavuzasin.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/bajenijilakabonunedimuba.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/33291659525.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28663e0a3e---rivibitu.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/57817286593.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c4ab37167c1935650198a3b1051d93f1/tokimesizuvilujoniw.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/93967944634.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210620_042054.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/ba618553f344bfd569f9db84831ae113/notaxilozu.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c6736ae04---61244537081.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4574432c3c---dalavabokojebaso.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/psl56kpkidcbil09v1n697mv2a/tukizixuxe.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/85177154559.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/3q5kmftqi6ov271frt1p6vat0f/situritilozar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+long+to+get+your+bachelor%27sPDF 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_off000138a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A3 10880 bytes
SHA-256: aefac2ff9c025562b2004755d34835830949f706357a0c590c684e54448d1cb6
font_01_sfnt_off000151e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151E2 17232 bytes
SHA-256: 3f5b5b06ccaf386cd58d47b16a446d5f900dc15f4cacc80610d293ca6d7085c9
font_02_sfnt_off00017f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1