Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6df2659827fa61…

MALICIOUS

PDF

62.4 KB Created: 2021-10-04 08:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 26230227ecc0b6b83385876f55886539 SHA-1: af88af59a5823d90319b73d709f02c248e5dc467 SHA-256: ad6df2659827fa613979fcbc8108cbb1496227c34724531583cb9c4f4d020747
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and a 'link farm' heuristic indicates an attempt to redirect users to potentially malicious sites. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest it's designed to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5578

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://atrax.hr/files/36597971397.pdf In PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/72422525403.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/jisoxomarap.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/fatetolazoxafu.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090320365683.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/rosasukikaxeveti.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/metoruwufavexilesigavifaw.pdfIn PDF document text
    • http://alcantara.cz/data/file/29820606988.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613573a92da39---65086673959.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/79865622256.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24934664773.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/61558336073.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/tifofuguroxag.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/vomowuzopiwafavakutod.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/xobip.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/86136481076.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/fojekakomibazizosoxipamu.pdfIn PDF document text
    • http://semsaesp.com/ckfinder/userfiles/files/guwarutiwogitudogel.pdfIn PDF document text
    • http://sdtr.mdrap.ro/fckeditor/uploads/file/gerelosipedugug.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/84224285216.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/gopanosaxikejezegak.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134aeca5cbaf---31121329975.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/13820220065.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/50764753138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=empire+and+puzzles+new+heroesPDF link annotation
    • 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_off0000b4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD7 10788 bytes
SHA-256: 55724529fe96ed73da226218a5cca3b3060c5684cd187ee0dc15eb3b7a738683

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