Malicious PDF — malware analysis report

Static analysis result for SHA-256 773963bfa22b941a…

MALICIOUS

PDF

83.8 KB Created: 2021-10-15 08:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d339c9744d007e1db8f47367f2d46a8c SHA-1: 5aebad1af7c32c052ad793264a5b9c6c8b0fb0f3 SHA-256: 773963bfa22b941a70a5d080579194f0e40f156be047575e6576c6d95caef03c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The presence of numerous external URIs, many pointing to disposable domains and identified as a link farm, suggests a phishing or malware distribution campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5559

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://sportsclinicwest.ie/media/contents/file/47180140918.pdf In PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/pameligolijabijexuwebit.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/givefuwixi.pdfIn PDF document text
    • https://www.alliance-educationsexuelle.ch/ck/ckfinder/userfiles/files/gamukuzulojubise.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/15340268661.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/lejoxutob.pdfIn PDF document text
    • http://aedjtj.pretty-match.com/upload/files/sejuruza.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/29021933657.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/49163523403.pdfIn PDF document text
    • https://kulittelor.com/contents/files/22150126526.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/zaxogewizis.pdfIn PDF document text
    • http://findacommodity.com/upload/file/lorisarafupowulufuwaxus.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/sazuzexuvuwedevubepasegux.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/69583168586.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/vuvuvutowosimuxezolunemid.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/16907534387.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/26696750699.pdfIn PDF document text
    • http://ingore.cn/upload/files/lazomubukovanegunigefubet.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/622461786615a6c49e9815.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109052033168136.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/84827724720.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1614549d356828---58417003501.pdfIn PDF document text
    • https://tarsiman.ee/files/file/52776806736.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/gavix.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/2I9n2o-U8HI/uplcv?utm_term=black+piano+playersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11487 10528 bytes
SHA-256: fb223d4e5985f9678caa958260e46e813640c43a4cf19dc4b2a58eb97d2955bd

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