Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d574fe7c7875627…

MALICIOUS

PDF

83.0 KB Created: 2021-09-17 13:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8c3eeb891c25b5aec54949323804dc16 SHA-1: 255d11bfe868d6593e530a97695dd6f841bdff5d SHA-256: 1d574fe7c78756272c99076bd5da34c5139d7b2af42d6db2670580973357065e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=turn+based+rpg+android PDF link annotation
    • http://evo-models.com/uploads/userfiles/files/79838313807.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/96531205673.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/nimoluj.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/79845566772.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/82251025006.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/borosotir.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/71081295925.pdfIn PDF document text
    • http://sdds.be/userfiles/file/59547971540.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/43591535550.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/92274332045.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/jusenadaluzeledefuzol.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/19amra1omuf7h9n4jh3epolm21/xisozuru.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/39809835385.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/kokinox.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/47736876007.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/80601095990.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/82573098505.pdfIn PDF document text
    • https://remini.hu/userfiles/file/jifamonejoludelubib.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/lizunezemup.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/51490007566.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/vosevakivokuxesigefer.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/81655103894.pdfIn PDF document text
    • https://network-italia.it/file/42910044033.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/98414539415.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/70549589884.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_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 10624 bytes
SHA-256: 24fc1de13a44ad3e933e1cb113440e6a9e0f3ba0e206ec8c7756bd67710086f8
font_02_sfnt_off00010edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDC 18236 bytes
SHA-256: 74da0aa3fd2f9d1cb6f40dd1a44208a815753a13c9af647435398fd52152583f

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