Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf199d232c38d37d…

MALICIOUS

PDF

91.5 KB Created: 2021-07-09 16:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f16e86b37b1f875bff9730af39b4f982 SHA-1: d1b951d0ab8b4cee47ec69cfe49d1461d006bfe0 SHA-256: cf199d232c38d37d82b1aef17b3490b13f4e2db78701333ef8f49cb6ec9692ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, indicating a likely attempt to redirect users to malicious sites. The document body was unreadable, but the heuristics strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070064704115---gewadipefuganopup.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kbc038909r0f4dptd32hm126f7/36090811602.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/54022514705.pdfIn PDF document text
    • http://industrialdevices.in/uploads/97864692955.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607186344984d---pedolejetuv.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ac69bb63c7324dcef50bbf7561538cdc/65338164517.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/83fca632d534cdee496d1c05e089ea39/7843318874.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/6195091915.pdfIn PDF document text
    • http://teraval.cz/res/file/mufodutisod.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/14175254444.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d1dd3ad1e---3929598072.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/28365564987.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/divirodisateja.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89619f381---67358181161.pdfIn PDF document text
    • https://alutat.com/data/file/fesivenipotev.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085d4915ce47---62390630509.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b785b8477---13928827877.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5f64c02cdad0e70e6aec4fd6fe28be63/49628246921.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/37076478623.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071de4206c6a---kemekutasibaku.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/87105624975.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608451514d322---pitudopasolep.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/fixujafaripemumol.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bc106acdc---xigejotefisowukubo.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a564520a410---63842003888.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/gomumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+user+manualPDF 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_off000101dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DD 10348 bytes
SHA-256: 7cc26e9bb05d5bd963c29caf870afb1276ed47c9107a81df7d66c8a05fd92331
font_01_sfnt_off00011906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11906 17612 bytes
SHA-256: f4dfc03b96442faf8a5c125f7931b16215941f6a0df82e0e3680aa96069d1718
font_02_sfnt_off00014710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1