Malicious PDF — malware analysis report

Static analysis result for SHA-256 605f413fb97a3b5f…

MALICIOUS

PDF

70.3 KB Created: 2021-09-25 00:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 22afbffaa5c86512b77a4a58cbaa5760 SHA-1: 0f60fc27f6d246fbca5cb2a659bd61bca2b1c443 SHA-256: 605f413fb97a3b5f26d13ce42883c2c344808deeea3f37d8e3c0131769dabe36
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://wastran.ru/uplcv?utm_term=wear+os+for+pc PDF link annotation
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/6omj9okn0vekhf420pmfso7qt1/81502794949.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/35225545561.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/kokadufumanovipizepo.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/22372265868.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/57358637940.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/83467733330.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/togoboxapadob.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/kasexagizexadojivuvasif.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/romekufexefigaj.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/50481724031.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/64640923830.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/93362042409.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/xoremugitufabe.pdfIn PDF document text
    • https://wecareprogram.org/images/file/tegogidowopanoverakotawi.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/mawivip.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/kudifuxagosuromodupe.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/62162802781.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/161404b97183b1---wopovebefidaludom.pdfIn PDF document text
    • http://arsvet.ru/img/upload/bafigeve.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/tibuxixim.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/kopilibetuwe.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/53184181361.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/tobibilajenig.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_off0000b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A4 17032 bytes
SHA-256: 0493eee30686a6a341b201e16e3658be02ee7c7b3af584d7fd655db005db9c0f
font_02_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 10124 bytes
SHA-256: 014217eb66f550260f2f37e237dcea6557de2978496670f27a9007e5ecf23da2

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