Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d444307eaa8e6ec…

MALICIOUS

PDF

63.8 KB Created: 2021-09-11 22:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8037f4d55708c08610ec4983687fd655 SHA-1: 13ed87b1a9ea517fc20f2ac6f511bc383839aa0f SHA-256: 4d444307eaa8e6ec01cc527da16102d436808d034f24cb185ba86501ceb85dd7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to disposable hosting, characteristic of a link farm designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9617

Heuristics 4

  • 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
  • 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://philabc.ru/uplcv?utm_term=downfall+full+movie+online+free PDF link annotation
    • http://andlupa.com/userfiles/file/14713121464.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/kizodumorunidat.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/kagofamaduto.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/59584221943.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/xafivogedinis.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210906_CE854ACF3CCF40C6.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/zenosawodezazowusak.pdfIn PDF document text
    • https://umartravel.com/files/68386531523.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/binajotizegekedod.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/jovemo.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/pinuxujur.pdfIn PDF document text
    • https://gilbertems.com/videos/file/21105215542.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/xavakivuzara.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/bexefumaxefesufogi.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d13fe6c4e---xubid.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/83173871335.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/86217277800.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/32324502691.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/59572178520.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/wobose.pdfIn PDF document text
    • https://www.confirmedtour.com/files/87315832617.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 10360 bytes
SHA-256: d71f42597b703eec4a1e544fc0a8960b979b546b885172ae45ec64c234bb29ef

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