Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb896ec3af4984e…

MALICIOUS

PDF

87.8 KB Created: 2021-06-26 19:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e7b9ce9ce6a6416c5f0b4cd48646d5f0 SHA-1: 5609576817836ddbdcecb6a3e1ecbc284fd84364 SHA-256: 2bb896ec3af4984ea4643bfb4b5971347aa7576f89e7fe8e1c51e97c0814a490
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of these links indicates the document's primary purpose is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=during+electrophoretic+separation+the+fastest+moving+lipoprotein+is PDF link annotation
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/9bcefd400d10bdbb1a90947f4790d4ee/70154915056.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c1e6ba40a---welumekujafutabu.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/7e1df9f9e53e86638fffef814b4f1e8c/nukulefawokimivebon.pdfIn PDF document text
    • http://falerisztika.hu/tmp/laxirazenotexofudo.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/54afde87efbb9497cfc311fc63b35561/raxijefow.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/95781382974.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f1f1b1e27---90923706253.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160839fbf8dbe6---42942382643.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/e8744db9cc58f3a4f16481ab33692d02/jorasawugajizakejosorazi.pdfIn PDF document text
    • http://duhochmis.com/files/uploaded/files/donaxeletazuxufosojurub.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa403f08559---56737193984.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5bf3c6bbc---10338568482.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/1e211064fad819e862b0673c11de0fe4/kunepuniru.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160cae9d894fd9---tarijalesipugi.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/89869861431.pdfIn PDF document text
    • https://chp-travel.ir/data/file/14387592493.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec34ce4da9---8835263071.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/77917411410.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/linujawofodajo.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/17930039512.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc6c29063a---tajowusitavobumu.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/02fad4e0be6bf25b9617e5d76e074aaf/13459641658.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/48730969617.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/8759972109.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c47aae1493805fc11f77cd01ef573ee9/64225623412.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_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 17032 bytes
SHA-256: c4a7c7d6ace6caea36790180d35adcf64a68d3b3f116a6816a75085a59ecebd8
font_01_sfnt_off00011d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13587 11096 bytes
SHA-256: 0096807c541af3aed58d226b8dfdf880877403710717d6dc60e1d6393269a4be

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