Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0faeea64796aa6…

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 07:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d445746e8b21667a76b4f8d0ab09854 SHA-1: 9bc1f08d0905017cf02b7dacac65ece7792aaf88 SHA-256: 4c0faeea64796aa6b8388a1aba34bc85a18358653f9f4a6e4ed8fb06f63e0208
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to various domains, some of which are hosted on compromised CMS upload storage. The primary URL suggests a lure to download a game, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt. The embedded JavaScript is likely used to facilitate the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=download+game+ppsspp+sengoku+basara+2+heroes PDF link annotation
    • http://garagehayashi.com/js/upload/files/35386120624.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/xitenutubejome.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/loboz.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/i3k61u21drlemisb6s2dj0cjil/tijereb.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45812311014.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/5a2af8eff7226ba485737c0c4a6d9d51/juwomixesutabakepijav.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/27600431451.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/30544143289.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2e7c1229b---mavubanibasama.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/rukanimaxadita.pdfIn PDF document text
    • https://sergiomauri.com/images/file/28555512143.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/03a29654b570bdaa4e3c320e7644d40c/zawoxugufegaro.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/51771880934.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210914015642.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/vonali.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/11623877786.pdfIn PDF document text
    • https://tdfstore.it/file/74120656762.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/43491033272.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/mijasixekedagif.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/68747936348.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/wakidelugupor.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16146c14dc11a4---69191884910.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/jekuxenedisinuzujip.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/vedagupatafuxeti.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_off0000d640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 11188 bytes
SHA-256: 9980ab9464186b565a8a5970e6fe64b1955c018c1757343a887be4ff76f14ddd
font_02_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 18564 bytes
SHA-256: c990106b9933d6302a6d4bc57715273b0e6113df5b0c425dbf3907f92ea9b543

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