Malicious PDF — malware analysis report

Static analysis result for SHA-256 0609429ea84144af…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 19:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 59a4ee77b738353251f4ebfb6f85edf9 SHA-1: 2acec74bbf6f67519385e3357e7920c15981c86b SHA-256: 0609429ea84144afce90736650726efd183956da55353e2b1b9c75b8c42d059d
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to redirect users to malicious content or phishing pages. The presence of a link farm and the detection by ClamAV as a phishing trojan strongly indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/4ea0a6c7076e18e57e621e09cc564f26/45438519271.pdf In PDF document text
    • http://majorpropertygroup.com/userfiles/files/79027061130.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/1vkpjon3k8ln3svh7eeru759cj/fisolokup.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210616_011CE8E2CB3873A1.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210606200532761849ei452.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d7201e5fd---tijumilipokemaxubiv.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5d08ac271a2f48748cc6f946b9b7110e/70058799669.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/0ab0afdaeb7e65bf1ab7d3faa21d64db/xepoxedawototodogutasoni.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/rariturutisok.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9e3636102c7be413630d6faf0e84f194/meveboxalujigifodubagiter.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/duburipigotud.pdfIn PDF document text
    • http://geodez.com/pliki/file/debonivom.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d0d29c50f1e0f05a639617899de83975/29524624496.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8eb6b0f66ebac3694b6af0d9cce55d8d/besuwovorekubesumigifi.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/mavapuzavokexebarusubujat.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca6275755de---8559625592.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/6iclemkl69mt7fcrpnhj9t9fpu/43709430819.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb4f8aba28---sijatodat.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd3fb85b2---66453946692.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/94712afbadb1ab839b27fb2918a2d2fc/fawarunu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be4f6453417---13567817161.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160749f16e01ba---36181060489.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/78788764206.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/kifosemus.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/ustb1b269igialr9popr778lmu/pedabotowomufutex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=power+electronics+viva+questions+and+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 10764 bytes
SHA-256: 6ccd4acf981610e075b33674e6ccc182219779d42a0444474c78af525ba17612
font_01_sfnt_off000110c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C0 17776 bytes
SHA-256: c32e66c85124381ecdccafd6f00df084c5fad66e70baf509c972785e6f8ce4d0
font_02_sfnt_off00013f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1