Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b0e969dd7fe7eb…

MALICIOUS

PDF

86.8 KB Created: 2021-08-17 19:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ebee4b2e0e64a48d410d42c914b4f2e0 SHA-1: 39db688f04b52ac07784bee2c5fb2fd6e274681a SHA-256: 96b0e969dd7fe7eba033ebb4c696718a9c82177fe99c9febff5abaa1fc91ff27
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+much+money+do+you+need+to+day+trade+td+ameritrade PDF link annotation
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/ruderosajipudosorivazo.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/10929294438.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/dc28597b55440e353fee2b439947d261/lefigo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bc872e4ae---dapegadagerupefur.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc98b4bbc7---76033385169.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/6029102055.pdfIn PDF document text
    • http://clarasonic.com/upload/file/76534147116.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/puzozozaluxu.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/zalorotinuwafepukivenelez.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/rimoxasub.pdfIn PDF document text
    • https://oferta.lt/i/File/16392517722.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/nanuniboxuropevigetoliv.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a716829d7---70171881242.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/lupax.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/fodak.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607300dd1a4bb---pexuwij.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/guvomuseropanaguduwi.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/fugotu.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/wipexejokejozulej.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/80512018594.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/93457806691.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/50083614341.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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 19064 bytes
SHA-256: 414b959efc1ad3e471ce9b8bd5acf3623b7b96927afcf6d7125fee4160240a4f
font_02_sfnt_off0001347d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347D 10712 bytes
SHA-256: 44c79a8051f7f6f988fb3857b810258f3b6f4c7934451b1e160fc63227b51d6e

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