Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edac0b015a0c510…

MALICIOUS

PDF

74.3 KB Created: 2021-09-04 00:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0e6b1b19b3cc50ecf5eaffa0a44c96a8 SHA-1: 0ebe3fdf65900e9150d1ac8a345a0b6c73d3268c SHA-256: 5edac0b015a0c510672db28d86cd5a30eee812eaf62fa7ded5f8947c241b6eca
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, likely serving as a distribution point for further malicious content or phishing pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to leverage SEO for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff007ad630---22078914882.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161145817a4b44---ruvuja.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c954c2f28e9---wovadilifodufevage.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/emadofibawak.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/89945286239.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/muatu928tbulgh88nrllj8hv2a/tisarozabetujixujorawumuv.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c81f4847b---gevirikisepurivevo.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bb38b56ea---fimanokigetunexuxugurega.pdfIn PDF document text
    • https://areicon.com/images/file/57579454923.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/tasozeka.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/jegadaxalegiguzebawowa.pdfIn PDF document text
    • http://linza-market.ru/upload/files/30631896544.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1a335349b8b7f6eb9c52dc6e507fc35c/99381381972.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/d39058b032a9fb71c399215f5316dd17/suzew.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5ddd6ab2d---pelanob.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//13502186082.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e414e0b50---sesuwaxifuloxowixetaxun.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/kuvenajagoxojolakigaposu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6ad412f10---sixigegowudotijoxebodiniw.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160da920605817---letugonu.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f6a463fdf---gebidutimeg.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a1d0886f7---jolubikupuvel.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/80274835027.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/e45d72360c936ebe240bf09600e828f3/83182568766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=solar+installation+company+profile+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_off0000bf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF14 16792 bytes
SHA-256: 8859b26cc5281d1edbc92a9eb26e4d00ce5d137dc144bb22fa9fe5f7d3497f12
font_01_sfnt_off0000ea6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 10972 bytes
SHA-256: ddbc01e2c7634beb3ba21076b7b80e6dfdfdc8b3ed311a50a4c1226a8c114143

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