Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d3b0a24d721dad…

MALICIOUS

PDF

79.6 KB Created: 2021-09-21 06:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52d69ec44e35359e11bc2e881a1acb3b SHA-1: ae78f028dac4ebc134a6be006a79120f401a9f31 SHA-256: 65d3b0a24d721dad2fcb9e66cb276dbb5199c737e828a35270171f97999a211b
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links and a visual download button, suggesting an attempt to trick the user into downloading further malicious content. The presence of many external links on disposable hosting further supports a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=cara+uninstall+whatsapp+di+android
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/tukibajedumufavakim.pdf
    • http://banglenhospital.com/UserFiles/File/4478367889.pdf
    • http://stringquartet.biz/web/images/fck/file/farikevupuja.pdf
    • http://www.binghan.my/userfiles/file/mivupemelirubogopazugos.pdf
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17705888586.pdf
    • https://accuratesearch.com/userfiles/file/mevukexuvagujigajebafeda.pdf
    • https://mlmrockstars.com/ckfinder/userfiles/files/10138321459.pdf
    • http://santeh.md/img/files/risigoduwop.pdf
    • https://mabuksusu.com/contents/files/69076471110.pdf
    • https://www.miotsukushi.or.jp/system/ckfinder/userfiles/files/89761408253.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ve6ih9bd1le8icd0trevv1hme8/67535807460.pdf
    • https://terracetemayonetim.com/upload/ckfinder/files/kajevapufaj.pdf
    • http://mabifitness.it/userfiles/files/94063951159.pdf
    • http://genarchi.com/data/temp/file/33085101463.pdf
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/jaligisa.pdf
    • http://www.peretprod.ro/content-images/file/matet.pdf
    • http://smartvoicecom.com/userfiles/leluvavogexopi.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613305ec39975---lubegide.pdf
    • http://obchodsezlatem.cz/upload/files/4382412767.pdf
    • http://kstarsmall.net/userfiles/file///43221809833.pdf
    • http://federicozucchettiarchitetto.eu/userfiles/files/10531675098.pdf
    • http://cannamelis.com/userfiles/file/69155153158.pdf
    • http://pro.ovh.net/~tribuene/images/banque/file/73445326738.pdf
    • 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_off0000d47a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD47A 16792 bytes
font_01_sfnt_off0000ec8c.bin
f1c84c5fa784fe50a93fd2f3815c5ecd137e3c0e279f9a7cff6b0296c9d79e3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 17220 bytes
font_02_sfnt_off000118e7.bin
fd6458035a401d780e9066e649b93ca668bc67404c17ce69865e94829e323c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 10576 bytes

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