Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd3f24106f9ff68…

MALICIOUS

PDF

91.7 KB Created: 2021-09-02 16:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9c3a79fef24d27863cd5cd7e5f4a35b5 SHA-1: c2a91e17588b93f2d6df76b5b8515405bd39bdac SHA-256: 0dd3f24106f9ff68efdf25560d185fb6416103430b046e6090e97c6fab62e993
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to lure users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this phishing or malware distribution intent. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=8085+instruction+set+architecture+pdf PDF link annotation
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/pkkn1s9mo1jdhct8lkf6dftg23/34142226711.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/34795646800.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/8348327712.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/smekqdt5jo16o5h4bksr9k3mkr/15170566239.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/1d5b444803b733d06bf5aef26e0b0d7e/lafijobadapakezerutuf.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f089fbc8---pazobolexojuruzife.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095ca385e0a5---22197408587.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/zevereketozofumafogi.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/6338bf6ada9fdc99f3a7698ce1830486/pobekululodif.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/72542708896.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160982c04d096c---julibonowokepinu.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b3e2ca42b---43785125330.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9d039283---18852804670.pdfIn PDF document text
    • http://metallpress.ru/files/zisodizit.pdfIn PDF document text
    • http://muszempilla.com/files/file/gaxikawefefumizujovu.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/rakijumonam.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210822000719-vevijexafox.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9dc88c27de---radamisagu.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/butudinetojorov.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/93758816868.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607976fca7551---wekapak.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/pifekipixe.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/54635993281.pdfIn PDF document text
    • http://potlista.com/file/files/37701615621.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5426c8f34---nakafome.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_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 17908 bytes
SHA-256: 423029738b29b5bbc9b932f66a22a6814e8a01bbffc3a15af6d977cc71bb377a
font_02_sfnt_off000146d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D2 11136 bytes
SHA-256: 4c4959cbab122d9738be3afbf9e6eced62436016ea03810df21e9d95f1905a94

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