Malicious PDF — malware analysis report

Static analysis result for SHA-256 df066d2468dde541…

MALICIOUS

PDF

73.6 KB Created: 2021-06-21 20:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c02cc9460155128a1623acc3815c3ec SHA-1: cb9925fd534ec0cfaa3a955052eddbd9fda26bec SHA-256: df066d2468dde541467ad07cf8cfd94b51c647048eb478ae4a3fdca8b897a7dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body's deceptive title, "Full mario kart wii character list," is a common lure to entice users to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=full+mario+kart+wii+character+list
    • http://www.allatpatikapecs.hu/images/file/32812606706.pdf
    • http://jnnycc.org/userfiles/file/toxodu.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a3c914f641ffa126f61679eb92955f3c/ferewu.pdf
    • https://dienlanhhonganh.com/images/pic/file/safafelexadoromuzusipaf.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210525195215.pdf
    • http://russia-ex.com/gugageka.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1bcfcad32827583be82a0d6a322a2384/feberesigofarizabi.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607665a09bc3b---varaz.pdf
    • https://aprenda-atdi.com/uploads/files/lakexemojodox.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b949a3a699a---jevunigelotuwejutetej.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/3taiciti8rdp8n2q2jckfcfshs/xoxevexesuzaror.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bf49a939756---gawoxetabogabike.pdf
    • http://phuocthuan.vn/images/pic/file/17076441947.pdf
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/22381951779.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e276.bin
f6afb4317dce3b7ade505ae5fd19631aebd388d55fd4071b57049efdacfd292f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 5148 bytes
font_01_sfnt_off0000f3db.bin
6b6efd81ea29261981995c9c7180fc5072de97a28751f50d8ed319a19a1f6c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 11144 bytes

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