Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05354fc10e9d8d5…

MALICIOUS

PDF

93.1 KB Created: 2021-08-23 13:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f087ed635d9a2807e7658e3a4f855259 SHA-1: 1686d78e1a77b5fe197c05017be2d2f4acb4f50b SHA-256: b05354fc10e9d8d5fb3376afec47dfde5520f464f733034d20c6336d8858e493
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded URLs indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://peptidturkiye.com/ckfinder/userfiles/files/73522591077.pdf In PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/57c182e0f5cf73dc49da4c9283ab876c/22259860675.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/947915872.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/519a3f08b2ea1d168fb29357d1a57e9d/3696737321.pdfIn PDF document text
    • http://axwelindia.com/uploads/pukodimoxudosidu.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/8567935590.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/jod183220rkp1jh3civ7g0tafu/zabibanawi.pdfIn PDF document text
    • https://digiconelectronics.com/media/walojalaf.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/dadowipemaje.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/kalita.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/fibozodetupeximu.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/midodijejev.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/zedimidaroxukow.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/opl39vf61hla68lre10s3t1gk7/sotatusagiv.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/vemonopunijiramaligu.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/paxidibozutibododaku.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/f555be65b154e2b98a3aa1268bf6728b/35214717041.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d357671b5c---riwusatodo.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/9ai6h7l4obgfvlj082q8f6v4u5/pigatibebisikoza.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdfbd9291af---46996339950.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/o9fk1n944lr1a0hf2poeed39fc/lowudapogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cub+scout+leader+namePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a3577692fd65a6fd3df9347afd590e55/jumunisosonolevixoti.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 17068 bytes
SHA-256: 7abc02de3f6c61f2be39853063f9ac90f4cc28ba74a75eb25afb9799234ad410
font_01_sfnt_off0001367c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367C 10712 bytes
SHA-256: a67d90febb7fe8217b77e64b81f31d60f1cdcd4936be6c08df993454d6aa5ff8
font_02_sfnt_off00014f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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