Malicious PDF — malware analysis report

Static analysis result for SHA-256 372f53e04f457bb7…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 08:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da3392ef31e942f096cc3521a9600243 SHA-1: 0d524b6531abb7f79d54901740eadd07390be554 SHA-256: 372f53e04f457bb7b9841b4c5a713816f30d3dd8f36bbdb5da04ff50fdae8cf9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, suggesting a link farm or redirection mechanism. The PDF structure and heuristic firings indicate it's designed to lead users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=apkmodmania+dragon+city PDF link annotation
    • http://kingtonkatsu.com/uploads/files/kesurot.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/negotikal.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f697e0f5dc---bewevezagowokoli.pdfIn PDF document text
    • https://rm-parketi.si/uploads/81289105947.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/rukosufadetulizixij.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/binenovinupoxesi.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/17742140146.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/xirakewitaridujerunona.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/sizim.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/10930502587.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/67659315304.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/fusuxu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131dca9655dd---mosorexivum.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/sasubedila.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/buzesomebosamurofu.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/kukaragitazodovuxudeze.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/96675257779.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/lawimopisimovavenajibe.pdfIn PDF document text
    • https://eslms.com/userfiles/file/visofotimawisefowuruxaru.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/likekezuxarixoromano.pdfIn PDF document text
    • https://avflash.nl/upload/files/28016071139.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/nomadizofi.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/fareresuronejepejag.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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 18412 bytes
SHA-256: 0b4ce6352fd6d25f606d8138b8c1140b656bdc4af5542ad70b8f330e1b05b232
font_02_sfnt_off00011962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11962 10700 bytes
SHA-256: dcc23cc112e86322445434e3caf0aba4e00269a381c967604ae426fa133973aa

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