Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f7029cfe67ea34…

MALICIOUS

PDF

103.6 KB Created: 2021-08-14 17:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8e1116f4eb58bf3d8a6558776485a8c0 SHA-1: 51755346517cbffe4038ddc4932d8869dc63346b SHA-256: c6f7029cfe67ea34ee1c7145290f21189d3e6da61441c548ed6161f93bac8879
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed for SEO poisoning or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=qu%C3%A9+significa+la+palabra+instruir+seg%C3%BAn+la+biblia PDF link annotation
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t2o5jnk4jtfkskmdk8qsfr197a/faxanexewaxafuk.pdfIn PDF document text
    • http://evansmedia.ca/userfiles/file/kaviliwumisepejumurim.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a445be4f314---fefunofisuduma.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/lt1vge9k9j34jdo27ed0epoeb6/kuwajiromatodisolapobo.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/jufawonofaletodajurude.pdfIn PDF document text
    • http://castanienfamily.com/clients/74558/File/50932754363.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/sigikebowiforekanupu.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/bofefolix.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/zetetofofatetamevididofe.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/kesigulitanujawugufiwad.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cca03d572bb---bedomujipug.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/61f4d348a7238993080535a66c3afdc6/jexufi.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16073eda223cd8---87995969142.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/511b67241099bfe53443775f2a17b869/65210786487.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/dasaforikorekezizuzot.pdfIn PDF document text
    • http://jngf.cn/files/file/fawuzodoxuxadidufutoma.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/fepidibebaneri.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/megajugiwemifisobezudetep.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840dc7bf526---14215056009.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6fd9af748f298d091239f9a533608162/wabur.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/bakaxegukokogelomu.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/jl7gaslv4hnbkd4rs4j3qk66bb/89342066379.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/wozavamasiludodurode.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11055 11104 bytes
SHA-256: 6bebfae9f83349c3749049c74996e3acb8974094d7f29de26a50d74f25c4789e
font_01_sfnt_off000129c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C0 19968 bytes
SHA-256: 543edbfd9ecc6f5765583d4739de720160ffca98091dda7fc1a7f65bac76335f
font_02_sfnt_off00015b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17377 16968 bytes
SHA-256: aa6d7a65d53fe8c83d1edffeaeef973703afbc3519295f476289d02806cfbee6

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