Malicious PDF — malware analysis report

Static analysis result for SHA-256 c608389735f163a0…

MALICIOUS

PDF

78.8 KB Created: 2021-09-21 08:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 38dc8548b8ec58169a992f26df30c6eb SHA-1: fc23d23fda36b94822c7b835a769ef4f6f6170ba SHA-256: c608389735f163a0e923751dc447920f1d5b04aa8854ff103dadcfe3f4eb1604
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://olympicthesportshop.in/uploads/20366303313.pdf In PDF document text
    • https://vinasimex.com/uploads/file/levexusazop.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/xuzonijenojesepare.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/pigoripisixapabamek.pdfIn PDF document text
    • http://fxlcd.com/upload/file/51397473812.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/zagomiwisonopumimobi.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/vozerur.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/tirafetaba.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/24496620651.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/46985721155.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/70401052081.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/wugojapiwozevaxuronemiwez.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/54608758747.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/18328fa45dec3445c666ab2a301cafe3/wolikadogivifokirojifibib.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/kodatabobupuxexuzogiguju.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/wudekozagoritak.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/3415765445.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/21492204541.pdfIn PDF document text
    • https://phuquiland.com/upload/files/99488920590.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/86407170829.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/wozewepupevalek.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613627a3a43c3---janaporoxuxejugur.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/ralodasokiselevosip.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/fexolidulizuvojiguzuvisuv.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/34144149892.pdfIn PDF document text
    • https://sergiomauri.com/images/file/dilubikebadalum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=panda+app+apk+downloadPDF 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_off0000d35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35B 9972 bytes
SHA-256: 153a1a0754d96029dc5049a8ad5df500607051263883bc8a5fc36dc20a9bc2b8
font_01_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 16836 bytes
SHA-256: b0b83714abfc71b8a0a24b467535b84b8181b04f61b04796bfa38040c88a1992
font_02_sfnt_off00011508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1