Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07be0ec071acd76…

MALICIOUS

PDF

98.9 KB Created: 2021-06-29 11:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a92d808a1a49482868a854889ffa5d87 SHA-1: f48b1dddd74cfb9ec9a1e5ea77a60b87caa2ab2b SHA-256: f07be0ec071acd76914b631281e2fc1e3e97892d60dcdd4ec4c665ddf49cd2fe
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to facilitate phishing attacks or distribute further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://nomylo.ru/uplcv?utm_term=a+closed+plane+figure+having+all+points+an+equal+distance+from+the+center PDF link annotation
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1fa6385e3---bakopujebomisokinipula.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f995e625e---migewukag.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/48071639493.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/81da0ea1168e59219141a09bbaec9b05/52960081550.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/98498308228.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/mhnjos754h2odsfc1f7q3kt9d2/97098603391.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3dbb65b9426e8026cc202b35261b3c18/fenizonisipamo.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609dda5bea8fa---3662293201.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b24ccfd42---vofur.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/64064296820.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085791a14b07---werinalidedizeziliwosobo.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ezigewexuloful.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/22064158994.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc2b4cc97---46027836805.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/raworemurojawimusuko.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/69993613726.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/b24b1b3a42fdf792dbda1078a8a500c9/41798902045.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/34148960155.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/63536172743.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/16898791647.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/s1c8q2dsle0rhv9mihkapkeh65/lisixakoxegodemi.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/pgjhepkmc29ins212efs1aqmdt/fofani.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/f210p8epn7mq7pnd065rpmn0t7/guwuwukedikelig.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a54e2c9ebf34e5487332ece10139457b/nitub.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a23c14fbe8312ce7d2ee6162bd75fc7f/48806922338.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/4508389680.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_01_sfnt_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 18416 bytes
SHA-256: 374b7ae36785e29c9220c1b00158f3a37324c9017999ac3d63e255b80db729cd
font_02_sfnt_off000149fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16214 11360 bytes
SHA-256: f80e7692e5169ae0f7edc4caa2964b838b9c676fead6272bfd15fb145f281c5a

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