Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f054f6b56bab5c0…

MALICIOUS

PDF

100.2 KB Created: 2021-07-12 22:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 26893cceab8463628e19a514883827a2 SHA-1: b624d70937c651bbcc88aed60e897b97a0203a82 SHA-256: 4f054f6b56bab5c0a0a706164c65c4e8467b925b2480de300e459050a4e049c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the URLs likely serving as the primary attack vector. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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://ketchas.ru/uplcv?utm_term=the+24+consonant+sounds PDF link annotation
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/v9augfr03mttb5fgk3j551r1u0/77283328250.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8c86e68c4---72055217223.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/c618a7cdaf2efb110ec22824fc1bd27a/gitemakumop.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adb793869fe---25225576949.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/jatavore.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210622_152410.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/i80htssr278uki3i5einsbide5/pegaderebazoxasopejizogop.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/kudodisoxawijibonuxokufor.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/wopurom.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/fiforevovanebaxunefawuw.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/47144495539.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/33963669538.pdfIn PDF document text
    • http://abc-tel.ru/data/File/nagulegaribe.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/dc77f479494362992354b6cc5d6bc31d/66732870275.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b657de3a1---ronojopom.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/67965801246.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/46074510449.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/54df05ea2db66e1e4504de47bef53184/ribadarirajute.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1da024b4a144fa1ec5dbe3a709a58f65/4322683492.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a6eea0ed2---22772180641.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/65626191167.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/49570059143.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/84662518943.pdfIn PDF document text
    • https://aashianarealty.com/file/zosuverifizalif.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/12750257330.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 10488 bytes
SHA-256: 935cb705d08858b774152061b9c35f1350027c74f67b50160cf6acc12d029297
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 16388 bytes
SHA-256: 666fd0ff64e3c49d69554c0d848160af76f4e1b41d93b23c4f45c7075b2c89f6
font_02_sfnt_off00012523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 23456 bytes
SHA-256: 0076da4bbe8443706023875b962aac8218535df7b5d0e8162a004520d66cc3a2
font_03_sfnt_off000161fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00017a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A09 1764 bytes
SHA-256: 247b3407a9d94fe9701534fdcb4d0b7d8ad44f6536ec4a85b10cb65ca830debc

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