Malicious PDF — malware analysis report

Static analysis result for SHA-256 569ecb3739792dae…

MALICIOUS

PDF

93.4 KB Created: 2021-09-06 20:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e95344f43ad73f5eeac2216add394e59 SHA-1: f9d38fd53083fd4a3f84aa49a97e877ebee70dfe SHA-256: 569ecb3739792dae0865d0ac9fa3d6317fc186ec31e830cdaa708e6ac30fd80d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, many of which appear to be compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/j9fmp9b8oiqtp4ghjilqrpp93j/bizatokekosedatutege.pdf In PDF document text
    • http://bezagsecurity.cz/userfiles/55745018636.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/62bec783054b25ff7dc74f2cf75004bf/41704808377.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1610edba42ec8e---vadibodalisoz.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/tesamemewanevowu.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/35845550307.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd7d0b1b6---50693518000.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/65499076401.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/69ede3383606c1438b1b381b409540aa/zajikifavani.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/089340713a151b554bd3bc9104d784ab/kovulopunano.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/20906991320.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/53937009326.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/ximulimugopumanujesazes.pdfIn PDF document text
    • http://clingac.com/d/files/81958136308.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100ad926c558---23034270652.pdfIn PDF document text
    • http://th-hl.com///upload/files/89696907278.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/85857770222.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/52518157304.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/15968547572.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/38403510239.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/netezug.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/87662075378.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/87637781474.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/dakofepowojosev.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/62091087445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=von+neumann+model+pdfPDF link annotation
    • 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_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF7 10268 bytes
SHA-256: fd6154e03575d6d64aaab622f6a5e032b1236a4739645accf958298c53d7e5a4
font_02_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 19840 bytes
SHA-256: 30471f0d86670d333ba51e785f11fd9f4caeeca7fb862209c09bc7cf3312cd39