Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdde17197be1eca…

MALICIOUS

PDF

75.3 KB Created: 2021-09-10 07:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 72c54dd6ac8e7cf2575ffb89091609b3 SHA-1: 4b5c39f9074fc3c4ac93cae0ed28f86c7da123d9 SHA-256: 7fdde17197be1eca7beb44770e0f8accdebff4ca4cea1dbc3e792256c04ebb1d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to host or redirect to malicious content. ClamAV detection further supports its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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
  • 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://worldcastlive.com/userfiles/file/16029627314.pdf In PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/30192626025.pdfIn PDF document text
    • http://erdbau-rauch.at/16302494391.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/6649711020.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/fipelapixezalumegami.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/upload/file/21337619064.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317e83458b8---9565025311.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tujasizovurebowuv.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/vizoramojifa.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/80892065207.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/97658918547.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/fopazojejateranopiga.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/kojijapefamuwigamexuf.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/89099619224.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/fekujelunejosarudozefewim.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347367a3ffb---36668926591.pdfIn PDF document text
    • http://turnyras.lt/Files/file/28520101406.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/90346901776.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/pupedimige.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/gobazuzesevedumutit.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/kudumenatuvatubanovorenoz.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/53349313418.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-9/file/89642333442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=good+words+from+rPDF 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_off0000c75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75B 10008 bytes
SHA-256: a38e5fa52e683c20a938ed91b093a07403e95f8c232023035d0d901412a8f487
font_01_sfnt_off0000dd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 16608 bytes
SHA-256: be506c7fa22780990b1fe421dd26b4bf9d5e2777a850217d95b6d9aec3a48303
font_02_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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