Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dd996a9e4a3892…

MALICIOUS

PDF

68.6 KB Created: 2021-09-26 14:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 55b38c0b3f788bf8a2a86662c1df657e SHA-1: 94c66536e53208971c9e587d0c5d8e21af5393be SHA-256: 92dd996a9e4a389288d1b9c00fa2735df0a4faad2a181b6d5365d2fb0c3fbeea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=mobile+legends+adventure+mod+apk+unlimited+diamond PDF link annotation
    • http://onelove.cz/file/1507956005.pdfIn PDF document text
    • https://revive.fashion/upload/files/vadulaxamemeruzonunupajit.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/kekenupajaripijesawi.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4e547b81c---jonivudeta.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/34290598005.pdfIn PDF document text
    • http://thevalleytrader.com/files/67847885781.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/zivazurikobedile.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210901_68CF725F591E8709.pdfIn PDF document text
    • http://teifsepahan.com/files/file/15840304896.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/lotojibowapobulevivotepi.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/28983018226.pdfIn PDF document text
    • https://suny.cz/files/file/gekukemo.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/80776764173.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/xubiluwoxuvigonamofi.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109122022529308.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/dfedfc48aedc6fcc88a1389623f30fc4/mibanojejolagadujudagusat.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xivusorezizolajonilej.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614a14d292a9f---zonesaronituvefeg.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/fenuzaruxifibelesilewig.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/golunen.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/79359502477.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_off0000ad97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD97 14936 bytes
SHA-256: d568ee969a59986335574bc8aec8ba9dc223ec84d55413b24ef9d83cf0dd1e03
font_01_sfnt_off0000d32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32B 11128 bytes
SHA-256: a2f44b5d9e0cb10245fcb4664b7b1170a5cdc8509b84253ee9b048a031f3ad89
font_02_sfnt_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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