Malicious PDF — malware analysis report

Static analysis result for SHA-256 924304418f04064e…

MALICIOUS

PDF

83.4 KB Created: 2021-09-13 15:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a6778ca13efa54a7648b137cfb951b8a SHA-1: 2f8938123352a774e60754167198fc66a9afd8cc SHA-256: 924304418f04064ef34ab192cd723c8667b548a83474f39d1a83541b19359729
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The document contains lures such as a 'download button' and 'urgency' language, common in phishing campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31644897539.pdf In PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/71124251975.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/2916948960.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/79539866237.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/pavemesodujuzixinakidome.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210909_126D7F8583721C98.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/89266930940.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca0206b60---82579412776.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/486107602613ab5305f032.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/padelomesir.pdfIn PDF document text
    • https://superchills.com/userfiles/file/vububovefalodiwajitozopo.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/67802539137.pdfIn PDF document text
    • https://cmoretv.com/userfiles/61318726052.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/jodamadipikawixutogax.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210901220111712.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/67223609998.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/57637673666.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/zewilufadaduz.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/webonewegizaduwodejaxodul.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/51901998577.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/96576076632.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/8896334159.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/55850514915.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210901_19CBC390640B4BDD.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/tetes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=texas+chainsaw+massacre+full+movie+123moviesPDF 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_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 18824 bytes
SHA-256: 2b05fe385e000ab81d07c4e38c70940a0d1a389c828fd391e2b9aa62926ff966
font_01_sfnt_off00010d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D49 11164 bytes
SHA-256: 956076e470dfd7bb01d537218301daa4101d411ce6527a0277d2f1c8444ecbbb
font_02_sfnt_off0001275e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1