Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0925cb3af904226…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 07:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0041b97db82142460e163dca4c441ec1 SHA-1: b9b5bde17a4272dc1e183383d6fd7400f02c7bbe SHA-256: b0925cb3af904226a8c8cc7825f1995a765ac0d8942f85a81a557f32538906ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=a+passage+to+india+movie+online+123movies PDF link annotation
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/86538703558.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/47639627443.pdfIn PDF document text
    • https://somogyplusz.hu/files/48637219067.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/lapowe.pdfIn PDF document text
    • https://novsport.com/content/File/kuzadarek.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/duzotamegitunudidinadusu.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/poxakebidijili.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/jutiwu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136cd8c539a3---30611728047.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/31663672359.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/72343218832.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f7ee6f8b5---28250462459.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/89528718192.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/pameja.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/pusewunedalujojimu.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613713c425651---jugevilowirusapef.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/jadimutenolujirorek.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/zarokesudupul.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/1239439596.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/365cc303525e62fde168e05f74276e7a/jimeloxofonakozanov.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/voxepunubep.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2109111230501959833f1k5x.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_off0000d65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 11024 bytes
SHA-256: 229610d7cd52c16dc2cc721d221fc91c5030a6d94b104e5f2583baf6fb1817a1
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 17188 bytes
SHA-256: 28ecbe7d652f092380805ab18be01fef99a1a5c8fee6fe50f07ab405861136e5
font_02_sfnt_off00011be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1