Malicious PDF — malware analysis report

Static analysis result for SHA-256 190bfeb79ce3ccb7…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 23:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d6a425f439f9fbffa5f2c5ea069011f7 SHA-1: 0f671c3eae770c9dd39065be4141216b9b82e2f5 SHA-256: 190bfeb79ce3ccb7a29e001a11f7ba33a9480dae72e867db16d43a4b25b76aae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting sites. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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 http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a949f8ee0d---lizorojomagugexibaj.pdf In PDF document text
    • http://siblom.ru/files/upload/file/91922924758.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/vopefajogumigobifas.pdfIn PDF document text
    • https://ms01bet.com/contents//files/74391361447.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160c918e61e313---lotafawifosa.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eb8117c96---99675578573.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/xamolibofiz.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/maturarusepukaburefi.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/45726574752.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/natata.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/37723485113.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/4750319216.pdfIn PDF document text
    • http://charivne.info/images/file/bevorigerefogeja.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/11691854386.pdfIn PDF document text
    • http://tai-group.com/upload/files/89646783941.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/39530186560.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070785ce77b8---85851439661.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff95bcea76---71894132888.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/iptdt51gq60dqkh0fv992ordh8/91026469523.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/40e4b8c62e4972fe7d5f51675344a0eb/98131595690.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/39233264986.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/vaxituzelumanuwuzokenutow.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16112bff2ee1cf---22514134146.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/6c495df95d4c94116c1ad19e7c3c7ee4/20426376108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=canary+wharf+shops+map+pdfPDF 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_off0000c1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 18076 bytes
SHA-256: 0fa33cf473ac16758ef2ec0be43db152a3a20545f25f8df8b83a858560b425e2
font_02_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 10624 bytes
SHA-256: d5ade40e8aa1149ed3c86cb0179e3ec6e90f1b8611d9dda77300b40d72fadffb

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