Malicious PDF — malware analysis report

Static analysis result for SHA-256 204dd3390c239d59…

MALICIOUS

PDF

83.4 KB Created: 2021-08-04 05:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2d96dbed6b8aa26aeeb2e9672dc1d6b6 SHA-1: 86d897d1ec78d2a11f6979abb5767d96075e237f SHA-256: 204dd3390c239d598ece1eb798ef253fe2f6f2699d0b654ef2715ccf93ff8b72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://laborke.ru/uplcv?utm_term=bee+gees+too+much+heaven+lyrics PDF link annotation
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a979b9ed8e9---wuxoliw.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/54071039503.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb46b9d69---suxetunenilev.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6adcf15b82---geterop.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f594ec805c---41534913467.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/71250479625.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/66105824702.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/347b82fa4b413c7cc2f8dd9a74607c08/majifuzugadodakomozabot.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/penej.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/0291arnng84ult7dpn4ba9v7sv/49765759375.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/e7ihlg8ca91itsr6rbgjk9ecc2/68889815353.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078168e0403d---64947585681.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8bf0268abb65a503a03873f00957d70d/xebezalonoxefurevofidef.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/556532446.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/sisodabifufogamum.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/sekuvegufurolopononok.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/21050348518.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/29192102723.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/42j14u2i7fgrcb78holdgnmaue/10204112656.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/28261192924.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/90921616086.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/dusezilekevuroloso.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/5322884370.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609319f3b6f0f---jixudalosi.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/80597616039.pdfIn PDF document text
    • https://ka-base.no/images_content/file/xurusotef.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 11008 bytes
SHA-256: cf0605b11fe79ef2101549abfe1ea38cdf934b2fa739258cd338dacbfe070b20
font_01_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 16540 bytes
SHA-256: 71c272bcd830a8ccd712a5eb75340be31325f74c3dae717801b74b19365162b3
font_02_sfnt_off00011f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F82 1772 bytes
SHA-256: 172309685fe98285604e713d49568994867313c34855d65ac26f2a3d6e9690f4
font_03_sfnt_off000127c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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