Malicious PDF — malware analysis report

Static analysis result for SHA-256 473fc14e53332887…

MALICIOUS

PDF

74.1 KB Created: 2021-09-24 23:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 84ec6647c3752cdb73a044d3e04eee6e SHA-1: a388fd89f69e958f6d9ba4f5e3ae50796723c263 SHA-256: 473fc14e533328874cc3d649745de620c4516957ee0f9fa06a53db7a950a119a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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.
  • 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://archism.ru/uplcv?utm_term=fast+and+furious+7+watch+online PDF link annotation
    • http://gernano.eu/gfx/userfiles/files/33025183583.pdfIn PDF document text
    • http://terrietanaka.com/library/files/jovesiravebojaliba.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/zagujosuxum.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/77518356350.pdfIn PDF document text
    • http://centronegozi.com/public/ragovuzikozuve.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a2a649142---jedawixorafidujupibedak.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/rukirije.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/61713441924.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/25261244861.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/bogexafolavotakef.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16148e8b846c19---guzulosedejabogirif.pdfIn PDF document text
    • http://esteel.my/userfiles/file/gowebuwodiwajaxiwinarip.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/72346475829.pdfIn PDF document text
    • http://signauction.net/userfiles/file/79307505293.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/80769999221.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/vozodilokilowifukibiwini.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/14751830961.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/25135132709.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/xejametogexirip.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/6869450359.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/15327800973.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/609b40ea4ad7ba533b9b3f60d82775d1/33941315581.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_off0000bc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC45 17952 bytes
SHA-256: eb02ee090af274eee587161d5f21342d7aec2c65d6dfa8d26988e34d57fc8247
font_01_sfnt_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 10784 bytes
SHA-256: e5c27a0a337ec562fdb5e25bcaa3e211db972e0e00c9957527d50ad8d88dd646
font_02_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1