Malicious PDF — malware analysis report

Static analysis result for SHA-256 4473f1f1aa503aaa…

MALICIOUS

PDF

84.4 KB Created: 2021-07-01 22:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4dec360d7d9e3564a4218c9cf9c31d28 SHA-1: 6ec9f1a1fd40d0eeccbd9caeead2d7579edcf370 SHA-256: 4473f1f1aa503aaa7c2e28d55f90fc9ef91d2d080d978948d5f431f2a83bc33f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7515fb9e83dbac9389d0959930c9ecf5/90108005707.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b31da65d9f---77422981756.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/caa4ef04fd38fcd7c9b2f57a8e5266c8/32799175697.pdf
    • http://asfalon.com/__files/file/pedopewimiroxataku.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/p0um14teq0pus6o59lf8sl0ds3/buvor.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/3d1a30f64c479d74c4e3a61c117f44ad/vifiluji.pdf
    • https://sindonis.com/userfiles/file/sejifuvezuvukufijedafele.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a54fb801cdf17e2c61105a90a9ada28b/naputuvetomumefodurozu.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5aad7528bb---tuniv.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/q2bq608e99jqenrkuo48cgp48q/43543447795.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b9621285b---40316904470.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160749dbeb44ec---9243751065.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4c8f2ada9c887ccf6f7617d68f811629/danukuz.pdf
    • http://sns-russia.ru/userfiles/file/koligozan.pdf
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/41242604724.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/wamiwuzevetire.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/86b97f35f07cef1285aacc60cfaf6e8f/pafipebubi.pdf
    • http://mudrkanuch.sk/editor_uploads/system/files/96057721262.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/t6oh5deet149arcokk26mop7op/82050284690.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/1a05c4cc54f513efc0a665db3f935c0d/97290034273.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/802sktq932hrhdqk3tmu23chi5/dabofil.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/cb85054e616f21bb81b99ce4bac61b3d/64066791797.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0796aa4c110dc3d00eb163a8fb20c445/17952032647.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=what+happens+when+you+lose+your+license+plate
    • 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_off0000e6be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 16792 bytes
font_01_sfnt_off0000fed5.bin
2202000b6301e635ad405c9b899ec04da23bc43d7af45686cf1a482e58f4b9cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 10764 bytes
font_02_sfnt_off000117a5.bin
ec4a17735715dbe4a3e2a5a29399d7e715584747c527e3cb0794f561bfa4eab3
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 16544 bytes