Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee441475e63b232b…

MALICIOUS

PDF

95.2 KB Created: 2021-07-25 11:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4fa09bf38966e4d840947881c97da7c1 SHA-1: c75c3cce91d1345456f2b62313c37172edd09b74 SHA-256: ee441475e63b232b5bc59f97a83b11674516ee96b4aefe0a427a2d36b34bbcda
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of a link farm pointing to potentially compromised WordPress upload storage further indicates a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces these findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://aalatour.com/basefile/b2caalatourcom/files/71029322359.pdf In PDF document text
    • http://chronocertif.com/userfiles/file/nawurubidurewot.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/pagijotebiwulagurumunum.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608490fcd65e1---95766202290.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc50c1d8f1c---97058127442.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/puzus.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/jumukudek.pdfIn PDF document text
    • http://emaaravm.net/upload/files/vonujibojaf.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6455254b1584d2a247b3d1070b0c0f99/zimefef.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/dorowesaguliku.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k05bqfralt6i402hk4jlpng452/zirapokazumafuba.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/mouml9vp1thpte4ra83bgoqgar/29317299281.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/tebosiva.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/25629240009.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/070f4d38f2d653fb15aba52c38237be6/vebonelirixiro.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/viridafa.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/mojixiripo.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/b8551fd9b443ea67d02960281e5bd1f6/97329068959.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d801ecddd05e0253f013f3c43d1ec26f/menevodozavu.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/84339508873.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/sipobevetiregidapewop.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/35805765459.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f24246cf8---zisorewafozagilaxefi.pdfIn PDF document text
    • https://mytopics.it/uploads/file/bavidonexejitesoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+pair+logitech+h600+bluetooth+headsetPDF 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_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 20508 bytes
SHA-256: 1b17b031bdd943492158d4fdcba15d0dc2a5200cf9f1d8b378529f0f6d978f94
font_01_sfnt_off00013a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001528c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1528C 11296 bytes
SHA-256: 59124a8931869ef9a6ab95decebf024293e7ebbade04a1310b5ce133c0b5e55f