Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08becfaf4984c64…

MALICIOUS

PDF

81.4 KB Created: 2021-08-17 18:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 69db373dc4e0b8eab9dce0e9a8f15c96 SHA-1: 8adb7eedbdea56bc8eeae11acf55a7390e7816ae SHA-256: a08becfaf4984c64ae826e7065099f2e8dff01f266b898c34673bcad26bd11e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting the primary purpose is to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=platicas+de+bautizo+en+ingles PDF link annotation
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/uadtenp8sdlr6atttq3efhhld6/77007329904.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7976c39159---85718129769.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/kixitiwexir.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kipejujupifofow.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/87617052935.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089e994d4dc3---43423877394.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a660b641ba8---vutevidimowapeju.pdfIn PDF document text
    • http://lawngo.net/fckfiles/93415155681.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/lo0c7uat8pav3lfopeer446kac/99333485851.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/xixasovupotalo.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/36812915445.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/luzejukarexexudugewu.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/47914136240.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/c56f473ff6d3ec8ae407b3a4aa7f5441/4018108237.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/suzedufak.pdfIn PDF document text
    • http://groupkaishan.com/d/files/nabunup.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/71457627700.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/nadeginusa.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/t3q9pv9b7h3uqca241n41c2u0s/50585906109.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e94a7cc73---28709715149.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c94729e161c---majeven.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///89527554809.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/lefepenafudijakibaxi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/151b5803a2829a6f6709f5a4773f07e4/27790131798.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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 17284 bytes
SHA-256: 6d7c3f5e4ffc155e256adf888acd5b060dc88d50918f4f834d8ea808ad9bd0e0
font_01_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD4 10744 bytes
SHA-256: 1cf4405d084df5dcaa8336657802c40bac05210ddb7a26f50bdb71f933e38769

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