Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e297511d702078…

MALICIOUS

PDF

79.8 KB Created: 2021-09-04 04:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 65b4e3df1d504b65b62f046a5319729a SHA-1: 0913329efcd2023d77fcc9060bccb89dbb2f586c SHA-256: f7e297511d7020780b4e41b2420fba398d6cd584497a7c43df0d6bdc117fac9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://ijtm.in/userfiles/file/48440915094.pdf In PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161065848998ca---dutazojol.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/godekabukamebejexu.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ojr9as1n4208kg2kn15stpnbpm/82235630292.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/zawagaleribedizunir.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c87a69a7c57e0fbf981bb1f736587da6/66144562796.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887d023340b---36022975341.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0248a53c39---94873620022.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/32752730865.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6b52573e---71174524089.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/venuxine.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7bdb9cb93feb624e4325cdbd1144bb1b/96944175642.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/mutisus.pdfIn PDF document text
    • https://migger.dk/userimages/file/5238721988.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b328d3174---kamobodu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/b7273848e6c30d90c84f5932cb418505/kapululowadoparakajunepo.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/xuvaj.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612a347a034d0---95254203258.pdfIn PDF document text
    • http://anpo.vn/upload/files/timeroleguguraxizade.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/dijapofepap.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7abdf9cde9---pipasowujofarufatevi.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/25070492159.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/99ff5b6f0f34a5cd5e9486a2804a9ba8/18762449964.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c984111d16---71425157817.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/negisowutozi.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cece8b2a48---viwuverutelurelixofuz.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/80367756241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ielts+actual+test+reading+and+writing+pdfPDF 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_off0000caab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 20464 bytes
SHA-256: fa086a38984e16bf7b7a4b49e70efbe2fc28e4cbcbaa6f478eb1907b3c495063
font_02_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 10812 bytes
SHA-256: 5cad1665bc12e86b7aeb884be06c987ae3084254c669de19a52daa0a5379d018