Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a01da93f4b76b60…

MALICIOUS

PDF

104.4 KB Created: 2021-07-02 18:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3df90daaa352ddf5de50f406da0a26f1 SHA-1: dbd5c4cdddef417522df98d1f2fcd8ccd145b1f8 SHA-256: 3a01da93f4b76b609828af8e25719f8dde8bc46fc28e465ac2cb31b9c1ee80cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, although not directly executable in this PDF context, suggests a potential for further malicious actions if the document were to be processed in a different environment or if the links lead to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://easy2ticket.com/upload/files/96736009829.pdf In PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4a310f72---84825476388.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160db9385b984e---34094043205.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/1ea2643a0d6a1583b4892c68d270e3b3/mufifoporaral.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/13833950656.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/96091055211.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/wotupimatinopifixuliz.pdfIn PDF document text
    • https://ecoretras.com/file/wegivuxuwod.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b62a9b7640---19276095549.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/sixamejigogomedoj.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/88824512011.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076582b3961c---51391431560.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/lanedajaputedum.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4a547a6d7---zosutamonabepolavubaxurat.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/xemonenelep.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/mimiz.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/bisofifutukigobekunep.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/49747084580.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5b3701be0a858b64360cc36423d6c134/80219721438.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/r0su5ncmujovjhldofpcjk1u6t/96745041356.pdfIn PDF document text
    • https://bataretak.com/img/files/file/13830197922.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/30645114673.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/86755428630.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/keniwurodipavesemojeru.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/lonafikive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=reasoning+question+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001363f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363F 18204 bytes
SHA-256: 4a23834ed954783bc2801f6af3802edee59614a98d71a8f7ab148761621e29cc
font_02_sfnt_off0001662e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1662E 10612 bytes
SHA-256: c47b7d91759d0d2c701deec942d1d81a04c1b023b27bf3e91d7df0d65cc2b7ec
font_03_sfnt_off00017e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E54 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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