Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee2d67e09df8dfa…

MALICIOUS

PDF

74.4 KB Created: 2021-09-13 16:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c02c3f468ec7d4d00cc7b52b01b494ce SHA-1: 0be1ad7eeb58e4c8be8deae9f1556f7216122ef8 SHA-256: eee2d67e09df8dfa1444cd879b16731b82c4d662f76043042f5eeb1c471a0fdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://huntic.ru/uplcv?utm_term=how+to+transfer+entire+phone+to+new+phone PDF link annotation
    • http://windowsplusllc.com/ckfinder/userfiles/files/joguvipovibunifiwur.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/54444583152.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/d619805254b1ba8372d4b460eca24a23/kubosiv.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/zonozipolasiriwanifo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea05fe0276---69294558151.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/65ac285c832d5e6fd87c2196ae2d2a8d/gilan.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/golijigowotasamividu.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161322d76b23ac---vamoxinonul.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dufok.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210913100155026.pdfIn PDF document text
    • http://dfanchem.com/upload/files/65860381574.pdfIn PDF document text
    • http://matras-devison.com/upload/file/gabimadufew.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/11257258074.pdfIn PDF document text
    • http://orthodoxnews.us/file/pujedinuwejajiwazil.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/bojexujibujami.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/sojupazenalumag.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/16657777836.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/6927180752.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/22608886087.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109101353278088.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeb0398e3f---xoziwazekitugote.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1c5b0be9b---25491195018.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_off0000c013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 17144 bytes
SHA-256: 88108c660a05ddd5e667d3d7f3985eba9da8351fca5a8bf74ca34aa9939ae321
font_02_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 10484 bytes
SHA-256: 7f35ad83db914ab29d8d3f6ca152652be0bf6b187f2915f6c8f4fc5a3effbb60