Malicious PDF — malware analysis report

Static analysis result for SHA-256 6679186a9c01bc7d…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 17:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a79b791341d2c4a7c712826a1a577a24 SHA-1: eba1df2eb54ed946b542a3d61688f92adb402f54 SHA-256: 6679186a9c01bc7deb7bd151157729defb5d31b70bb6b0dacc89f761f602aa65
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://inwebjor.ru/uplcv?utm_term=best+android+background+remover PDF link annotation
    • http://skrabl.pl/www/rpbd/fck/file/71758457792.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/pisowokovowavi.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/5233911925.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/kunususedosisote.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/xipagej.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/49416464328.pdfIn PDF document text
    • http://dytac.hk/userfiles/6567008158.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/wevotilu.pdfIn PDF document text
    • http://balone.net/_upload/file///71594021369.pdfIn PDF document text
    • https://datajournonepal.org/files/37959170729.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/94152617460.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/wesipegewexijesivese.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161391d47cdc06---disesifolazema.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/xotogejejunisamin.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3ebe7b72e---60347864131.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/57703277913.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/31990389426.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/46177662481.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/dubamuxopa.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jobox.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/87337755743.pdfIn PDF document text
    • 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_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 17792 bytes
SHA-256: 80bfee0484bdd980e867b976310fb02fdfc6537035c9abb1b5360f5028b42f61
font_02_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 11116 bytes
SHA-256: 0efa1e3d6670cd23e191578fc4214d078a3793345490bdfcc3a6684bb1f95635

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