Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3d7ec22fada2fb…

MALICIOUS

PDF

85.1 KB Created: 2021-07-05 00:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5d98a5c3902ffdf3b3afd9563ca09829 SHA-1: 85b500a53f7c6c4b720d21bbbd33befb57432ae7 SHA-256: 6e3d7ec22fada2fb1b2fa08c66f92b540cb09ac0832f8cb7a2f3cb7079f72184
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms strongly indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://medvor.ru/uplcv?utm_term=madeleine+stowe+and+daniel+day+lewis PDF link annotation
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0c4bb47a8a32ff8b2dbe03b0998578b4/dosirigajetodonakotupijig.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/26112597966.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160804945b0cbc---fofimafesuravos.pdfIn PDF document text
    • https://loctra.net/userfiles/file/85062620949.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/dkm8h9jd26qaunmjsfqbkebc2g/52505048374.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/panamegoladifek.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cabb2d935ca---pagopidiz.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/18995585694.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/41447747d5f4763ba6a4c9337299dd5c/tasusuvufuvidobolitux.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/24115673341.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d29a3ac874---duwilavopaletexor.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/b71f3752f768b68d707236c23fbed559/11544251964.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/kinadixawominota.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/rivusurakejaw.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/68693593575.pdfIn PDF document text
    • http://naucseto.cz/storage/32986281866.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/93381386559.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079f0cd002bb---kurubisubelukadeg.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/piwisegowevedobadoniv.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/zaxijol.pdfIn PDF document text
    • https://chornakorn-packing.com/ckfinder/userfiles/files/guvudetonizanakugafixeguv.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/60553757677.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/kodogavejawenanewerukew.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160941ed9a96c6---4676145057.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_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10336 bytes
SHA-256: 9c525e6ecd23583fa40d37f2fcdd79220be424f70638444996a25ba63e7e4117
font_02_sfnt_off000119a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A9 17532 bytes
SHA-256: 755d0962ace4a387ac650891a0307eeb180f89493ae4f63fa0743e431becca8a

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