Malicious PDF — malware analysis report

Static analysis result for SHA-256 5feccf6645c6a2b5…

MALICIOUS

PDF

85.2 KB Created: 2021-09-17 19:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22039f6c113f56242c1af937c8873047 SHA-1: a2f86ba00f2454a0f262f1d49335b9234c15e4a5 SHA-256: 5feccf6645c6a2b5838e946a57f1e125f2e33ebb62875a68533dd4fe935b53b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links to disposable domains, characteristic of a link farm, and the embedded URLs suggest an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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
  • 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 http://blueyee.com/upload/file/022004424162.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/02aba4a772e2211f2da2a0948c192cd9/87909512201.pdf
    • http://vonschickenfremont.com/uploads/files/tedokulilupenojose.pdf
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/22742139558.pdf
    • https://drosamahetta.com/userfiles/file/26162746041.pdf
    • http://rajhansnursery.com/userfiles/file/69807105071.pdf
    • http://eatoceanic.iorderfoods.com/uploads/files/dujapukul.pdf
    • http://tischtennis-kiel.de/images/file/41610541467.pdf
    • http://usefchina.com/uploadfile/file///2021090108510090.pdf
    • http://evola.it/userfiles/files/38676209388.pdf
    • https://aviatroglo.fr/IMG/file/norijamila.pdf
    • http://hagelkonzept.de/userfiles/file/33333117969.pdf
    • https://dusunceokulu.net/resimler/files/23219093980.pdf
    • https://vcvscr.cz/www/www/fckphotos/file/govegazosidovodajirug.pdf
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/35499510735.pdf
    • http://growlink.biz/userfiles/file/78713460757.pdf
    • https://ajambary.com/userfiles/file/49163481951.pdf
    • http://bekescsaba.varosom.hu/userfiles/files/96191219195.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614137b89b340---16208121026.pdf
    • http://uelzecht.lu/userfiles/files/85493830186.pdf
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/gipeneginarolan.pdf
    • http://gamjagolla.com/uploads/files/koxusozuru.pdf
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/19202626175.pdf
    • http://hladonural.ru/upload_picture/14421523649.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=dhoom+2+full+movie+download+for+mobile+hd
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 16792 bytes
font_01_sfnt_off0001005e.bin
e6a45eb71e4cb493efb632159ec2af96f2a53ade052525f95d2fb425178df01f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1005E 17644 bytes
font_02_sfnt_off00012df3.bin
ef4cc3ba34dc1b364c32df15c897273fcb590d6e8f8ccc6d3a0ffa4716a4790a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 10864 bytes

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