Malicious PDF — malware analysis report

Static analysis result for SHA-256 22452b61dcafac55…

MALICIOUS

PDF

79.5 KB Created: 2021-09-15 11:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be6e2fc2c12fbbb7ae0d78d8d03644c0 SHA-1: e4a32810bb8441ac4ddcf04adf29b521131b81d4 SHA-256: 22452b61dcafac55582fd0770e41dfd1016dc9eb1c9282b6decf9ea9aa08f0ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=funky+bay+farm+%26+adventure+game+mod+apk PDF link annotation
    • http://ieeepes-thailand.org/app/webroot/files/files/xerunotatuwejojawukar.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/13157282282.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/lanorofiwuriro.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/051542579940.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/54096018367.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613074a1395e9---jivalinazesifap.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e13008692e---1421935112.pdfIn PDF document text
    • http://lactopad.com/uploads/files/rebolodatogotowe.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/lazetozabolaredurixiliru.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210906_D7A31ED9EEDED13F.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/91808314024.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/vovosawotomutirimawitusip.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/21405814234.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/98159620302.pdfIn PDF document text
    • http://js-space.de/userfiles/file/21836221202.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/loriranelabekigal.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/vuxevatat.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/64808438575.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/jazixodive.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/danafudedijipubomiviz.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/fejinubuf.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_off0000cd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5F 20124 bytes
SHA-256: aff43b7496fd7c093bb2ab6f122b5e24581dbcc58bedc5c4c53c5b47210d0937
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 10144 bytes
SHA-256: 544ab1842fe0fcabc2914eb5fc5eaa667b6621ca273289da31bf64b318f55db6

Open this report in the interactive analyzer, or submit your own file for analysis.