Malicious PDF — malware analysis report

Static analysis result for SHA-256 793bf05206f43a5b…

MALICIOUS

PDF

70.7 KB Created: 2021-10-08 05:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-14
MD5: e222d41871f9b14aad7a60db2e652002 SHA-1: 540e9d4eac58bc6789732be3f8ae5666f64a6508 SHA-256: 793bf05206f43a5ba904a82473cbea21da5b5a03ec5cdbd64b3e4135fd59d0cd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content. The presence of a link farm on disposable hosting and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful files. The ClamAV detection further confirms its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1615222150345e---vopadazuxesamopitokol.pdf In PDF document text
    • http://sakra.sk/storage/file/79622762602.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/votaz.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/rajepunefupujige.pdfIn PDF document text
    • http://nuuts.mn/uploads/assets/62420487407.pdfIn PDF document text
    • http://tabletopad.com/images/file/41753387958.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/85514861691.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/mamomag.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/goxaku.pdfIn PDF document text
    • http://benetalent.com/upload/files/72200143778.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-19/20210919015708873775.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/11132565716.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161557d1686651---forapokifozefux.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/20551021037.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/zawokitukovatane.pdfIn PDF document text
    • http://sujoydhar.com/userfiles/files/99525120720.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/49153522217.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140317d3bca2---kolekibomovubej.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/xifozudawetelibe.pdfIn PDF document text
    • https://csodamalom.hu/files/files/69071916946.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/49189856466.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/vedunedageminixara.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/89c04f49f6500f82154a05b2393218c7/kosegusomikerekaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=restrict+editing+in+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_off0000b634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB634 10512 bytes
SHA-256: 0311bf617259534e49e8d5526b4a11749ce52c1a4d879594818780705e183c4f
font_01_sfnt_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 15456 bytes
SHA-256: 0a924cfeb4751ec6ab22a8503842b2aeb66991652d979fcecc7c7081e4ddac00
font_02_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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