Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc037584b66c61a…

MALICIOUS

PDF

82.5 KB Created: 2021-09-07 16:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d75bc5ffc511888be548d417ab35faf1 SHA-1: 50eb5d05d4bb6116e26af5cac8c7eada746fd8ca SHA-256: edc037584b66c61a5e1509c3bdc87bd2ff7eb1dc7d9584015bd2ba2ac923af70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://infrive.ru/uplcv?utm_term=livre+test+psychotechnique+auxiliaire+de+pu%C3%A9riculture+pdf PDF link annotation
    • http://verkaufs-akademie.com/userfiles/file/18217283557.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/13385656762.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/08v4thas552lt7d1913vai04m6/47369984334.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/880640821.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a04f62667---1996905971.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/wasovisuvepa.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdf81f23c6---bubozarop.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/90316461694.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/dajuxejud.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082c78265fc8---jotapetolepam.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/72398577946.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/42602972482.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/af96d542b7e007f2632c60b26713433a/japekatevororusetigeles.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/87339136145.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbbfcf39e29bb87edfb413e6ad674a24/redovavorixorurefamu.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/xabana.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/buxegadoburamugajowi.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/gudulu.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ac1b4fa80ca66b0ddde5566ac768bfe3/9926178434.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/78302208577.pdfIn PDF document text
    • https://werbemittelag.chupload/file/1059294859.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_off0000d915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD915 18760 bytes
SHA-256: 1762ee28a832955e1eca44f7f03a929f43afaec5b34e503c9fe59dd73a9ac84a
font_01_sfnt_off00010717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10717 11356 bytes
SHA-256: e06f5ba98fc60c44b3119d1f806e0925be79a0bab25d0fc3b09e858a8905539c
font_02_sfnt_off00012151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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