Malicious PDF — malware analysis report

Static analysis result for SHA-256 9972755bce77bda4…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 15:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d665867456900f9a3d470a3cdfc68501 SHA-1: e30f1bdcf50af7e7c49dbede46d00ff37a351bfd SHA-256: 9972755bce77bda448ed474e8fef82daa32fbfc794addc412286ded732d21d1d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Numerous embedded URLs, including one pointing to 'drafthe.ru' with a 'garry's mod for android' UTM term, suggest a phishing or malware distribution lure. The PDF's structure, with many links on disposable hosting, further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=garry%27s+mod+for+android PDF link annotation
    • http://tatnhapkhau.com/ckfinder/userfiles/files/maxexele.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/12123887708.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/nefab.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/37062636828.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/11076282038.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210904_8F1E03591391F3BE.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/rawujesegogojitol.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/68499667140.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/38805874409.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/93352499028.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/xapuzixugabununesel.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/vifiwupuxavupiwesevebo.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161309e7745a60---2277177545.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e1276ae55---gikizogomeveke.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///rolemes.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/60621680701.pdfIn PDF document text
    • https://felicityokolo.com/file/dimugipeladegezon.pdfIn PDF document text
    • http://tabletopad.com/images/file/piwesujajomelefosoj.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/bebifarum.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/88662621115.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/36145812492.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/wezavadipevulozok.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/pazafepepam.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/potakeropaxixobusif.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_off0000de61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 10428 bytes
SHA-256: 0590ee008c00dd5691faff7a9249f658024eca363c0e0db9a3198455ed9d1f28
font_01_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 17676 bytes
SHA-256: 7c1b9b6070737a4d84748cbea9eef7cc85934f872395977c73620c6403afd6cb
font_02_sfnt_off00012312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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