Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1c9e14ac4c8c05…

MALICIOUS

PDF

68.2 KB Created: 2021-09-20 13:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e634251933a79d2f9706b90838d6ada3 SHA-1: 0acd725f30f43eb6ce0aa591010070f8a98054f1 SHA-256: 1c1c9e14ac4c8c05d742ee823336d89651572b7a079d5e8942e4258d75748e5e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, some of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ibci7h72cuphvv13jpf7v4uu7/68428521268.pdf In PDF document text
    • http://designpavelzapletal.cz/files/file/ninotumidi.pdfIn PDF document text
    • http://epmachine.ru/d/files/xubexalili.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/bolasibukunoniputijuxig.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/jamigukudutuwu.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/japexosopubefojux.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/45323960451.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/folenoj.pdfIn PDF document text
    • https://betsin.org/userfiles/files/66399568926.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/xivefupafumen.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/bodekegovalowukobuvomuw.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210920091859.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/16309513412947b6fed64518d0d7cf.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/67923643412.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/38134840409.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/71410544843.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/nefotizinetimazoru.pdfIn PDF document text
    • http://pk.mo/userfiles/file/97776527268.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/79850802.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/napapegudaf.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c070e7822f---basumibifa.pdfIn PDF document text
    • http://zuche0551.com/upload/file/dokazoduvagileb.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/junorovefizof.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/6870807346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+ios+theme+for+androidPDF link annotation
    • 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_off0000af39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF39 10704 bytes
SHA-256: e5f3c5faf287824c437df3bf089d5ec43259fc8f895050b9f9efab458cdb9ebe
font_01_sfnt_off0000c797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC797 14324 bytes
SHA-256: 418abb993dbf5165270d73e550fccb886f65805a352fc77ac4fd37ce73b6931d
font_02_sfnt_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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