Malicious PDF — malware analysis report

Static analysis result for SHA-256 9563189fc154f37b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-24 12:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 97e93daa39b0138515e99bffe15987eb SHA-1: f9bfc3e3d28259551f7251b79e83eb45d17052cd SHA-256: 9563189fc154f37b6c82179b7640093073dd4902f6576c65ad4d87c5521b3524
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it functions as a lure for phishing or to download further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://synerhu.ru/uplcv?utm_term=convert+excel+to+contacts+android PDF link annotation
    • http://kohaz.hu/files/file/lanerimog.pdfIn PDF document text
    • http://andreevka.topmebli.com/content/xuploadimages/file/50606987017.pdfIn PDF document text
    • http://velomagazin.hu/UserFiles/file/91927389456.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/73987040375.pdfIn PDF document text
    • http://weingut-suppan.at/files/notasilagaxozefevomu.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/4866401312.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613baa5a92859---51561387619.pdfIn PDF document text
    • http://comac-international.cz/userfiles/file/ketizikudesusufimu.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/gupizudararajigefuxanez.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0384a2e24---98926324688.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/17251919097.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/muwuwoboduvi.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/zagudukazuko.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/lamimurezanurokunuvavagiv.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/85652313348.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/36933511911.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/6606154943.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/pibexabiranekegad.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/sofuxurenuxiji.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/64326977770.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/91493544333.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/fiturodawuduv.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/puladunuke.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_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 18184 bytes
SHA-256: 86156842dde40fa4d6330e664095a3f255905e16f3e1967dfd242881ecf99e6c
font_02_sfnt_off00011be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE3 10564 bytes
SHA-256: 28d6ee97cb7fcef843412c309dcf2ffe793000b6708eecdaf2fcc3935d47d242

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