Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d5cbc6ecd72e7d…

MALICIOUS

PDF

71.8 KB Created: 2021-05-26 21:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcdb325141a2d22dcbec5fb0029a2585 SHA-1: 33b1a2552a69741a6166a4323514987d210aad4d SHA-256: 02d5cbc6ecd72e7db5baadc1ba36bda03ee448dff928b4ebb4da1dfe8bbe9200
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

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 https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/ebbea0041191dc2b09b08c504233dae0/262998698.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092efdc8a611---vipaliralesomafegowakez.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/7863280ab416f18933944a8e972e75a2/92993390040.pdf
    • https://aslimitada.com/userfiles/file/50224762296.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e94e91101e---moxelazo.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc2156a0d3---11481575096.pdf
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/d423da8d8f4ed8862eaf70262f3eddbb/98334612255.pdf
    • http://alnadaoil.com/userfiles/file/kofebimadewinojokiv.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/cn57v09u12h1us7lfdjmiv4qbt/8085542869.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096706151fd2---32457892764.pdf
    • https://matskaren.se/anvandarbilder/203/files/16810313818.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/96e03d454de7b8ea7bc0271ccf1b07c0/31681108012.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/14b6e760477d293c13b2bdbb0b2e07ff/41822530317.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e5947d25f3da8368c659b71739f2b526/89560195618.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607288fd2a6e4---sewikigipewijirasineviv.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/cd2401986bdcd8b186a3fef556c0e3eb/punilufiluwekomuxizivowoj.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb80846760---35054295888.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+use+acapella+device+with+nebulizer
    • 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_off0000dded.bin
a4c30bd4a6f3b8afae30c0e6c5107375b230ccacafcc3f43f243bc24bab8cb7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 5464 bytes
font_01_sfnt_off0000f091.bin
2d6c059a759fb14c07e0dfaa80dd2127e2c9eee0066940ac6d00b3e39abc4270
pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 9804 bytes