Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e367af4f19383d…

MALICIOUS

PDF

102.3 KB Created: 2021-09-08 17:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 3765d9835bc1f617afde4acf21801a19 SHA-1: a66d8bfeefa305eeb6e652ee8433d9354a703408 SHA-256: 45e367af4f19383d169d96474e954590183d4de800411c7ddd5e99460cb023b6
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=vessel+tracking+system+pdf PDF link annotation
    • http://www.plan.msu.ac.th/ckfinder/userfiles/files/93522867569.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/28325773238.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/tuzab.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/73968021461.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/35489587629.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/negimuzani.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/timiliwujanikoger.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/13127630082.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/gapawosoroworojubusagexo.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/76250190300.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/redubezej.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/11439353558.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/79627169264.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/bifafadasikevoga.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b1c74bc9a7787a1c670b42042fe5fa55/38708417771.pdfIn PDF document text
    • http://ombs.ru/uploads/files/jaboxokitudipegus.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/vamiwufidekubaxetomoseg.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/bojurijurowutumadas.pdfIn PDF document text
    • http://greenld.com/userfiles/33585490369.pdfIn PDF document text
    • http://keramann.ru/uploads/files/14768301257.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1630958810.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161323b68f3d16---65972694515.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vexedakojajaku.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/42646585893.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_off000129a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000141bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BB 18656 bytes
SHA-256: 35e4157f3c633bfeee46779dabd9f2dafbea2acacd6f6d3e418b22e2ee8e38f1
font_02_sfnt_off000171dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171DD 11016 bytes
SHA-256: a6a934fdaf23144c0c8f76f4e202424e70c2db8aff0c9baf2631f695d37b0032

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