Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02d9e1fabaaada5…

MALICIOUS

PDF

83.8 KB Created: 2021-07-07 13:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a3e9ef2ee01128c752e6c76f145b7c7 SHA-1: eb8a95d2ac4b8a6e635f09117a93355139f586de SHA-256: c02d9e1fabaaada5767964b1478331d09de7727bda91694ebb96b244f3e9a6c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to numerous PDF files hosted on compromised WordPress sites, suggesting a tactic to distribute further malware or engage in SEO manipulation. While no scripts were directly extracted, the presence of numerous external links and the nature of the heuristics suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f14abfcaaef6fadf8280d761a5dc7a25/53980669201.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b5d004bb7e0b56ebf2f36a2bc6139e3f/80059711073.pdf
    • https://liniagdanskzydowo.pl/files/26760314650.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/pumezip.pdf
    • https://businesslife.com/content/file/jurin.pdf
    • https://aduanaldelvalle.com/userfiles/file/kelivimi.pdf
    • http://kxnjl.com/userfiles/files/47095304882.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13e35cc5c---22466693710.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876a6daa36d---92504933962.pdf
    • http://bakoca.hu/files/file/44338651312.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16095f81f218ca---balikinog.pdf
    • http://elitaliaweb.it/upload/file/78586495002.pdf
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/73409438759.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cc8143a9f---46479752275.pdf
    • http://houstontca.org/Content/uploads/files/vutekuweketetefax.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e21b28317f---91599345456.pdf
    • https://ringid.vn/ckfinder/userfiles/files/83823075083.pdf
    • https://nestaerospace.com/uploads/file/kajasafimipezag.pdf
    • http://btfa.tw/upload/files/dukox.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/k4a0rribrpjjbl5bipmp39iqub/68528538348.pdf
    • http://gd-weimi.com/upfolder/e/files/20210628075204.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608143aadf2d1---43839615829.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/5sgv5cvglojr1vn8ple2amork8/84512348882.pdf
    • http://roocenter.ru/upload/file/vikok.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=moral+status+definition+ethics
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96c.bin
53e129b9a9446e01beadfd9cf9926694cbb1a6f974164da43dacb52a4c82f853
pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 15696 bytes
font_01_sfnt_off00011188.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 16792 bytes
font_02_sfnt_off0001299f.bin
e8c3b7d766559948fdcdcadce09c3395cb4e5e21a74c9cb6d72136fe78e6a4a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 10664 bytes