Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d3e93d74c226c5…

MALICIOUS

PDF

81.8 KB Created: 2021-09-13 09:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f7341b486fbeb4cd5e2dfa5da2a5047b SHA-1: 951eea68f2bd97b55af9797b56f9599aa82ba66e SHA-256: 68d3e93d74c226c5cd8003b87dce37e6c20d0ee29d231a0ab4a7bc43aed5f58c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The presence of a link farm with UTM parameters further supports the idea of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drafthe.ru/uplcv?utm_term=dream+league+to+download PDF link annotation
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/4689663e01fd790ac5a0d684d0477a3d/lotakoveluzisexisedeto.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/tuwojajon.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/kiludajiraximi.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/35243200226.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/35918533236.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/geguva.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/71814570488.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d6a892b6---76527471611.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/soden.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210902_7D177C7A0F7DB79F.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613115dd3d092---48578739778.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/8039010962.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f1c00827c479fdde7a613858cf9a04ae/puver.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/wafamekamed.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210907224645.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/56540920770.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/84053354646.pdfIn PDF document text
    • http://domplus.su/userfiles/files/7014711372.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/22345630172.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/61766368841.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ad325f6d9---82563267757.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/48691220441.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/wapaxibebutarefilusiv.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_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 10516 bytes
SHA-256: 42ff15c62f3c1d9e48d1142e63eb52e81473d94f9a79f8651a209f2e56202a6f
font_01_sfnt_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 17508 bytes
SHA-256: cbbd74f5aa06d8c5d9a15228d12f9b8a645d2b38a5961499da036626e2e26d28
font_02_sfnt_off00012194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12194 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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