Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeb295e030612f6…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 08:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b3dc0f695f759d8b0d542c93ac3257ad SHA-1: 7cc62d09a7907141696a319244b73120dd3121ea SHA-256: eeeb295e030612f6a30f31041cc15c2f8a496a66db5e9e30c5ea89e447fe75df
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate it contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d66a58a851---weketomume.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777ab29c632---todek.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8p3vd9viq3p3nr25l5ro8sejg0/nanogive.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075d23fcf80a---2653040991.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/mafexavexirabonapeze.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b1321baf---gejevojaxuredigebod.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d6d55b28---64371894012.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/21539040634.pdfIn PDF document text
    • http://sushi-belovo.ru/files/38051378777.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d2013cd2b31---39685857899.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/nadaxumaretatafepovebus.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/49023728176.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53c5f17861---27293076262.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/61490362109.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/vural.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/8834ebb303aada64a445e4599490d41d/5903964320.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/54424632291.pdfIn PDF document text
    • http://htcable.cn/d/files/babazowabuwedopewure.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/lagodorobuvasok.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/kalazop.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d7ea1043fe67c6db706e8608392ae46f/kogodaxaditatakob.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714427b0f79---semunamovowere.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/musutusarakojoruzaviful.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/xosoganusuwelozanagan.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/sopizojotave.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/kidijokizuxifunatesudinox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=iskysoft+pdf+editor+6+crackPDF link annotation
    • 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_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 18028 bytes
SHA-256: ce022556deca53950f0f25ee563cf0ce157688fb4efaca9cb376b2d5334470ab
font_01_sfnt_off0001181e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181E 10788 bytes
SHA-256: cb6c2bf37c21ad0c8b6e8814508cc6d7d334b5c2547462466715d7af243b3f52
font_02_sfnt_off00013134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13134 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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