Malicious PDF — malware analysis report

Static analysis result for SHA-256 752120f8a0aa622d…

MALICIOUS

PDF

83.5 KB Created: 2021-09-15 23:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: abf7cff096253623de205c007f8579c6 SHA-1: 41baf7fdd7d69b7486e69a7dc5be6023b31e86bb SHA-256: 752120f8a0aa622d338528a3ea6a7620d97be12c30358f902a2fcaf2727a4f65
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, a common tactic for phishing or malware distribution. 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 trick users into navigating to malicious sites, likely for phishing or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://c-six.it/userfiles/files/wapifarosuju.pdf In PDF document text
    • http://alacarte-grafik.de/userfiles/file/bamuvufebamuwubi.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/tojarodonenavudipiravip.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/90363679911.pdfIn PDF document text
    • http://full814.com/upload/files/doliwagazatizosupa.pdfIn PDF document text
    • https://t2sc.me/userfiles/sumoluw.pdfIn PDF document text
    • https://0900107678.com/upload/file/33854821511.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/nozikirepirijomejoge.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/20036897829.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613260acd38a5---48637750813.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/86752623240.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/vugutamujenazafimevazofig.pdfIn PDF document text
    • http://amdind.com/userfiles/file/18532594003.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/basigujoxudaniver.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/silobarusiwunagubux.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/56685650567.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/22916616661.pdfIn PDF document text
    • http://speckrepej.com/upload/file/89371315485.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/savafaredas.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/titubefufiseg.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/dirogelagumazavijipefuvan.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/larozozilejosetotavu.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/8344126848.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/rewaf.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/10017669709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=singam+1+full+movie+download+tamilrockersPDF 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_off0000df66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 18108 bytes
SHA-256: ad3c8efe8fd3181d893ad95984daf4e96565571a8101a512950cd44c367d1b01
font_01_sfnt_off00010dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC8 11292 bytes
SHA-256: c729e26fccdbc6f953bd2ca77115d13ec9959cde59c38265a6e753fb1507d8dc
font_02_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1