Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5369649facfb199…

MALICIOUS

PDF

79.5 KB Created: 2021-08-11 21:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e233f46b768a53c2655046883dd237ee SHA-1: 1be698ad794e44fc84d0c3d1a5b0b7db5a7fa621 SHA-256: c5369649facfb1995ab30e5040fe6bf941e4d0e03911fcb1eaa39571c432fa33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the presence of external URIs indicates a redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=why+does+macbeth+not+want+to+kill+king+duncan PDF link annotation
    • http://glassco.ca/clients/9/99/99aa1728c1dafa3cf8773a75727b87c9/File/dikeko.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zujotewabisisuzamifatu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fe2468d37b1c633de30cd85ebb553cb2/kawutisedogeginu.pdfIn PDF document text
    • http://absigorta.com/E/file/20547398568.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/pv5n98687ssh6vi6tb16u7j3kf/66662660343.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160803edd0ee14---tabikesorimonu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af0f0733621---revekogadevudi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/9be032f7e11e59cddb1f9a4f79d250fd/doriwa.pdfIn PDF document text
    • http://focostrade.com/files/20210612072551.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/miforonovobabibidegox.pdfIn PDF document text
    • https://airshow-bg.com/file/pajemole.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/csu93usr3t91uoif9sbbcq0l52/96399140590.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0de8d8a8a---85807106182.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/fulofexutifaxedev.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f06c8d2abde---gikolaboro.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/takaxetap.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c900a38d241---dofazo.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/gusuvodoz.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/90892429818.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/64829192624.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/9356963758.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/59887680220.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/29283993650.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/10195198792.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_off0000d2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEC 11240 bytes
SHA-256: e1f976e2511365bbfd0ec68f16e6d8fd8e5d4690219cd2a23e7eac1c3edc38a6
font_02_sfnt_off000104f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 17032 bytes
SHA-256: d718fc6f412d16abb12c9e72be689b5cb02d2ebc03402ee704e872a1b72732bc

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