Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c9e212b0c67591…

MALICIOUS

PDF

77.5 KB Created: 2021-09-29 00:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5cb39955eca2134e5d7e89e1f9e76c0d SHA-1: fe06472d0cb93ff3ad65d45741331f0fe42edb24 SHA-256: 41c9e212b0c6759198bd95baa49e91debe156f6e431b284f39b75b42985527d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, with a prominent one leading to a URL that appears to be a lure for downloading a game. The PDF's structure and the presence of multiple links on disposable hosting suggest a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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=nba+2k21+free+download+android PDF link annotation
    • http://webinaris.eu/ckfinder/userfiles/publics/files/fuzonawupirizijusul.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/p89un7lckevei323jrdgrh2ji4/47538711945.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/38672902568.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/11643976170.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/93068052639.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/marisiwazav.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/30189034542.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/vexugidaravunufom.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/dariwipixew.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/11011910295.pdfIn PDF document text
    • http://ttc-investco.com/img/files/nubug.pdfIn PDF document text
    • http://3m18.com/images/editor/files/88944112503.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/detitetapu.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/xojazi.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/63319783506.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/daziwageweresafeworere.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/lotanizidopimew.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/55433295928.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210908092328.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/lunijujupidudekazas.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/29170081729.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/fisamisegizelomijej.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/wunotadabugotubil.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c9f47f531---84996534997.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_off0000c148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 20328 bytes
SHA-256: d98fa7848910460a66df04770bcdb58dfa68726bfb85c00d9d440378058b62c9
font_02_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 10548 bytes
SHA-256: 7421be303427885334595c53d774210ccda0592bc13b9dd407494a93cb521a37

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