Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5fac4946c9edcbc…

MALICIOUS

PDF

88.2 KB Created: 2021-09-18 17:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2b4266df61f93f3f357d13672042d94 SHA-1: fbc153dbfd1e29e32045179630772edaad1be8b8 SHA-256: a5fac4946c9edcbca1a103d2843ee5fb0086e04023a2ef84cd50ee4467c94c33
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. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful 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://pixomot.ru/uplcv?utm_term=champion+horse+racing+mod+apk
    • http://bajkolandia-leszno.pl/userfiles/file/sefugakudepapopapame.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/sotonotegopibijineretoj.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5d36aedc2---61936765499.pdf
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/mufizanuvesede.pdf
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/bisiwolatolexivapesejivof.pdf
    • http://kiapelhrimov.cz/UserFiles/File/zuledezadumawen.pdf
    • http://nsfeed.com/_UploadFile/Images/file/3844529404.pdf
    • http://trevelci.ru/ckfinder/userfiles/files/nerufatazamuzinifajubuxov.pdf
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/3213909745.pdf
    • http://metamorfoza-krosno.pl/userfiles/file/46298462917.pdf
    • https://watosaphotography.com/app/webroot/userfiles/files/20210904_024453.pdf
    • http://eurolocal.info/sites/default/files/images/file/piriwaxanukuru.pdf
    • http://recviem.ru/img/upload/leseridulujiwovito.pdf
    • http://www.travelwithtaangoo.com/img/file/17524948204.pdf
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/96399793221.pdf
    • http://sipzip.com/userfiles/file/88911807238.pdf
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/biganasumiworafinusoju.pdf
    • http://terremeraude.com/userfiles/file/juwovefunejuloruj.pdf
    • https://xosobacninh.vn/webroot/img/files/38894907833.pdf
    • http://prestopc.it/upload/file/14803903825.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139998c55bce---lexakafimefupub.pdf
    • http://grafichesirio.com/userfiles/files/48480571357.pdf
    • http://luxmeterthai.com/ckfinder/userfiles/files/48931766660.pdf
    • https://dom4m.de/userfiles/files/xixobowilimetelifavuw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f0.bin
51f490dec637af09925879c9ad34969179cfcb77f4161cbd0a37b862489ab04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 18788 bytes
font_01_sfnt_off00012281.bin
54d9f0a25f463dc6257938aa87b939a0bdee0f8c617d8f1f360929e8e3bdecaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12281 10940 bytes
font_02_sfnt_off00013b71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B71 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.