Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe467dae00b9173…

MALICIOUS

PDF

90.9 KB Created: 2021-08-13 02:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2811d59b29b4833afdaa4faab0a7c646 SHA-1: 4094384220e262533663a7197fc1fb3f44be48f3 SHA-256: ffe467dae00b917376d3fa3622d8ffc5b08326e03c59fad725bc8a5b5e3175fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, while many are marked benign, contribute to the overall pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://studiogaleazzo.eu/userfiles/files/63714806175.pdf In PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b04cf953d77---tatodinoxubip.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/28960959612.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/sapizarotedebeso.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/52d339360b0877a5d96cc8b5c800ea81/poloseseg.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/julamasiwelonejobeleri.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160922c9647a25---jogar.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/3v0cnl2nmvlol50i83q2ml08vg/34135177613.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/vafefapa.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/40150166877c5a95a65dbd280c1ca2e4/zadate.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/fikololazopoxagiwas.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/37486044584.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/064a39f28f9d2cdbbe851ddbed9f9e07/12616087027.pdfIn PDF document text
    • http://gptools.net/userfiles/file/70920646568.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce4f6292d---57100228661.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/81698768373.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/jizoromirinexugosopis.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ca5ca220861ef16559e69b1d6d961060/4386976925.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/81173239402.pdfIn PDF document text
    • http://meadclassof1991.com/clients/c/cc/cc689d7a74a098ef67b43942063c7ff9/File/bibizukedej.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/33674025778.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/437e410fc136fba3f8b156a4dde853c0/zajupozom.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/rudesazozawebonabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=o+que+%C3%A9+golpe+de+ariete+em+tubula%C3%A7%C3%B5esPDF 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_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1A 20216 bytes
SHA-256: 03cc853ba8d39f9a37b1ab07cfb27db6a72ea6e76869141e66602d45e0116904
font_02_sfnt_off00014098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14098 11616 bytes
SHA-256: f47a803847b2f84f8504208ded28e7e75f6bdd157a64fb945d196ea35cbf711f

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