Malicious PDF — malware analysis report

Static analysis result for SHA-256 feeaa0af6a1ff380…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 21:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c53e7e9bd2319751958c9a5c194e106c SHA-1: 434163936c7458e88d7e85c3d4f47e46aa54c6bd SHA-256: feeaa0af6a1ff38050c35f4f27c2ed0159ded3120e3c60d82e469f71cb384226
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or callback lure. It contains numerous links to disposable hosting and compromised CMS upload storage, suggesting an attempt to distribute further malicious content or phish for credentials. The presence of embedded URLs and the overall structure point towards a phishing campaign designed to trick users into downloading additional malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=attunottundayorunni+mp3+song+download PDF link annotation
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd13e3af30---lukivajubime.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/nokuzusasoloruzatefo.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210908_1EA24A44F6479F56.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/nipadofegew.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/55370347167.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/94981709935.pdfIn PDF document text
    • http://17njl.com/userfiles/files/27910857105.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613746cee1d8d---zexibulim.pdfIn PDF document text
    • http://schokofontaenen.de/idata/tekonagobulemisefaku.pdfIn PDF document text
    • http://prompol.com/media/file/72616303682.pdfIn PDF document text
    • http://robbes.nl/media/files/40324593006.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/34362593060.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/munetetujojevuwaloxu.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210906_045858.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/98203539997.pdfIn PDF document text
    • https://il-gusto.com/images/file/ditasaguk.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/61560060380.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/somexolepabuxew.pdfIn PDF document text
    • http://tion.hu/upload/file/13121948632.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/7065472179.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/wokuju.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9b4752fe35cc4fbdf315a1bf0416567b/88133852351.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/17759236647.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_off0000ac6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6D 14868 bytes
SHA-256: 3c0e92f140e08e9597644f531375ccdd359d739a18b8a36bd6674662a8f99f9e
font_01_sfnt_off0000d186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD186 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 11056 bytes
SHA-256: 6e7e43abd6b774c7fd479b2fd86c5c93348bb1f941fb13f70aefb4c5ff13d0a4

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