Malicious PDF — malware analysis report

Static analysis result for SHA-256 adec82f482f00e48…

MALICIOUS

PDF

73.5 KB Created: 2021-06-19 23:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7e9483449bd28d3ac8d7a2b477581c SHA-1: 049f2ad306cb7fa61bf88a195711c78f938a56e9 SHA-256: adec82f482f00e481123c3aeae7ce49823b5935c38529582d188e102efe6fcae
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, contribute to the overall pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160942c2ae4697---14875509689.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/857853eqqiofu2l0oq850c8t0e/8137731385.pdf
    • http://baugeraeteverleih.de/benutzerdateien/38854842645.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc463aa0fa2---14252024753.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/160447a3b3fc7e36adf2b3c3da5421cd/kopupoxadototelevuf.pdf
    • http://escuelasfutbol8.com/docs/files/kejudezigavados.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/t622cti9ev6olneer0p5g2ei2c/xikobe.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8eba72b5b---97748579969.pdf
    • http://cainghienbinhduong.com/uploads/userfiles/file/givopaxagajixagake.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/g62vmj2a9tljv1bfbvjnf9aid0/67583823006.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b66e36a22---lulevikapefonojimolegok.pdf
    • http://ahsaipu.com/v15/Upload/file/202152157189997.pdf
    • http://mid-europe-ex.com/tinonukadodawozagafusi.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d49a7775a5e36b1133aa02bf1f6734c2/xatiduremegu.pdf
    • http://au-coeur-du-temps.com/userfiles/file/72234568578.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e46974763---nukuj.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ec1c076be27296fa732798a23d49718d/susegoxusamuvawu.pdf
    • http://buddhavehicle.com/userfiles/file/64760292802.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=best+free+porn+games+ios
    • 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_off0000e0cf.bin
7655e8de622bf3c796abf27f6deeba6a560d8b6a9415cb4d7c0c59a4aa55a16e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 5236 bytes
font_01_sfnt_off0000f292.bin
90700ce914f6bccc393ccfbcbf0111d68899f55657a7ecc00f2619166d84b1c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 11036 bytes

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