Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6abd9069b610713…

MALICIOUS

PDF

78.0 KB Created: 2021-06-03 04:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00df357f071bdea9c2c4c832a27cc393 SHA-1: 1196000aee69f4dc83eb9ee2ea70b73ed00dbd99 SHA-256: c6abd9069b610713fe78277e7e4354ee2691ce0e10d17ab77ebfdedd7ef59ee0
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised domains, disguised as a guide for installing game expansion packs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through deceptive content and compromised hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://caopump.com/admin/userfiles/file/36340603219.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6tb4opb6bot9bng4g33dag3uoj/58550861185.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9ad4f791---jovekasa.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1dfed69e---59059577942.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/98142dd43325d207d1313911dfed425a/wutara.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/610b53a4af251ab4cfd00576fd1c3574/xewikejivazi.pdf
    • http://poltinik.ru/userfiles/file/vezuvagi.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f95c426009613d88957d2c09a1805a8c/97324164689.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/n6t0kt5fce5fl4fj3fb00uvh8i/lisoxebabafovux.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b1c05068331071e611d7f27d5086c491/14159731123.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/jqe4m8gf4ugtp81g4mueegdidk/16983309692.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c5ae123b2---defasaju.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b23823ae46---waxalenofe.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38ce609894---voxotemu.pdf
    • http://changdahk.com/upload/76051603924.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/e8e059af7f9cde257cf311415f6e23ae/4275878570.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607683c921824---newobarixoxokano.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072eb0f22cdb---nilajoteziva.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607455c14d649---77040872255.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+install+sims+3+expansion+packs+origin
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4dc.bin
a9fdcd6f2e98e064ae5cd97eea5235247d3d6ff7e5ade793e1c46282a2668ed2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 5392 bytes
font_01_sfnt_off0000f726.bin
858e3f65c682c1ca9a4f681a868b3816219c64b49890a356a2e706e710590409
pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 11156 bytes
font_02_sfnt_off00011c89.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C89 4324 bytes