Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f84a3466570dd36…

MALICIOUS

PDF

90.8 KB Created: 2021-07-20 01:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef0890a251a2384feee09b289beb0afc SHA-1: fc7f29e383d2f605301be1c6085ad89dd9de56f8 SHA-256: 2f84a3466570dd36126ed5379bc1cd22702dfd21aa1945b9a7ee4585ec27b4bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious or phishing content. While no scripts were directly extracted, the presence of numerous external links indicates a likely attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af8382d99d9---87665780011.pdf
    • https://alibabaoman.com/basefile/alibabaomancom/files/47674341029.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fd35beda178aa1b5179348d1afe9f2af/dolinatiwewusinavavi.pdf
    • https://rosycaffe.com/file/63031457344.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/378adadd53abd61c635bc79e8d0c8c0e/77835295485.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e4d1597f8---refexenaxoxi.pdf
    • http://okmarin.ru/userfiles/file/35271518586.pdf
    • https://promise-land.com/upload/file/denesovapob.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/34e7a1a3faf2d548fa131da9566ae8ef/vapidukuzorabalaj.pdf
    • http://skupka54.ru/upload/m/10810897390.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a5f33965e845de711a331cad6c3875ff/tazudu.pdf
    • http://guojingmall.com/userfiles/file///tuxavixabogibevez.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adfcfd38d78---mifexadoto.pdf
    • https://gruppopolidori.com/upload/image/file/50920120553.pdf
    • https://amursvoidom.ru/media/files/venotiduterirelazemesub.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03a051d99c---38957630101.pdf
    • http://breakevenpoint.pl/uploads/editor/file/zavupotugebifivulizives.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/36068e7ff4bee5a1ee9c080c6d728b63/35251160485.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce0b634876---gikukijudotepufudivosatod.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fac7e9a91ae4a4359e59e6d68d33a108/lujalakiweziw.pdf
    • http://dailyliving.nl/ckfinder/userfiles/files/geditanutezexewabubutatap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dug+in+up+movie
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001058d.bin
6e93cdb13d56a7b38221720c3b44c75c6462ac1c42e76d918a7ae0ac75091517
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 10188 bytes
font_01_sfnt_off00011c53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C53 16792 bytes
font_02_sfnt_off00013465.bin
af532cdbb8e378f7f654bc9076364bccf2af60a07a84cc471183049f8c30e6f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13465 16560 bytes