Malicious PDF — malware analysis report

Static analysis result for SHA-256 025dbd5b52be9c95…

MALICIOUS

PDF

103.8 KB Created: 2021-06-28 23:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 276d694521330e2f56ca5758fe9c109f SHA-1: 88e77008df95074f81634099241b9970c076db87 SHA-256: 025dbd5b52be9c9536c67f606e042594d3ed62241b55bc8dfc932c0cd1113e7e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories. This suggests the document is designed to lead users to malicious content hosted on these compromised sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/2a139042a55cb87ed36e20d89cddfa23/47900085804.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/gun6qk0ei02pkhajsaip9164gr/voduxigopobote.pdf
    • http://olgapolyakova.com/files/files/panunupoxegexorulef.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/hb0vtgp5si161fn1vtub5pbv5n/zajexabul.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/b3fe792ac91af58512526f54869cfc21/64441456754.pdf
    • http://gptools.net/userfiles/file/muwiruwodijix.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf304e9a32b---migifukemot.pdf
    • http://zhuoer.ltd/userfiles/file/xamifabex.pdf
    • http://devison-matras.com/upload/file/pezapaneju.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a01ff6c7352---35784655970.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/adfa2b4973c659f4c33283a5dd07040b/tasitimenenoxulux.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/20ec65b236cc86fbe8f33ee23f9d7471/litoriginagorikevazokuno.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/025c97fe7419c77a571b2a219782b932/36880644280.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ljvnadrni6lvdk882mcfhoek74/60392078493.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075885def7e5---12050533302.pdf
    • http://barudan.hk/UploadFile/file/20210525180006481.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/2074dce8951e3b8414ae125478fa321b/nugisatanakavanibevozepo.pdf
    • http://espokebar.com/uploads/files/9369015928.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160abf3d038fc9---ferafakemunetofapem.pdf
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13555752919.pdf
    • https://ohcsi.com/ckfinder/userfiles/files/mutupodelafamozusuvofawi.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf40f93d7b---37285220469.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/p3idhbem46ttp6nm8t6nmc5ldu/14939386756.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/s5q6ovnqauhq9d6bp0a6h671m0/bosuviloluros.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/t5dud4dtotg5ggsonm98i27jlq/vurozabuku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sublimable+meaning+in+chemistry
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001732e.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1732E 18328 bytes
font_00_sfnt_off0000f2d1.bin
94e0136c1c2208b43c128ed343a7403db544aabd53df9fcc91c7ad20af11b8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 25848 bytes
font_01_sfnt_off00013200.bin
2824c3c01193ddb2d719f2ef0ee5bc229055822190fef3ecaa7b761f3fda397b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13200 4276 bytes
font_02_sfnt_off000141c4.bin
9e6e700f93e37ed52d6f405952f657e4e9f5c848bb3d0e4dff7efa98daa654d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141C4 10988 bytes
font_03_sfnt_off00015b1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B1D 16792 bytes

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