Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdc6ecbc94d2484…

MALICIOUS

PDF

59.1 KB Created: 2021-09-12 09:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d461b11e6b03247b2075da87b36d7b38 SHA-1: b6401843928352ed085ab741334ad9e23789352b SHA-256: 6fdc6ecbc94d248457db8ae8596b3cec6d11747eb3b61d077b6c17d5bc9eb9ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm. The presence of 'SE_LOLBIN_RUN_COMMAND' heuristic suggests attempts to execute commands, likely to download and run further payloads from the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7265

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://ketchas.ru/uplcv?utm_term=where+i+can+download+hollywood+movies PDF link annotation
    • https://deshpanday.com/ckfinder/userfiles/files/zesus.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/51590884275.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109100743579979.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/benowizugarixakaja.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/49794262fec6b015cbeb937f23daa861/93780571998.pdfIn PDF document text
    • https://ivanamihic.com/files/mexoxovoxubu.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/jowajivenakulolimopum.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/nogosaripa.pdfIn PDF document text
    • http://hrudolf.com/userfiles/kadesudalukuliji.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/fudobepamipajep.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328432b6334---vegadapazebewoxekodedaxuv.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/gokakidenap.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/49232342952.pdfIn PDF document text
    • http://citty.org/images/uploads/file/67955038764.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/57472669262.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/22729960464.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/rebonogigadamam.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/salisunubebewezivu.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/nikejetuketevisopixo.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/xadidivavaxalufomi.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/filowutigebozujunobix.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109041905058226.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/palel.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95A 15968 bytes
SHA-256: 64b28b2b4b6bbdf18e6b59bb20f2b6741f8cfb80cca64dd78701e01eea6acfc2

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