Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa66ce900722deb…

MALICIOUS

PDF

96.7 KB Created: 2021-07-01 12:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d1b08107d6893d0c567b9eb823568c0 SHA-1: e609431a080d4dcd91b9eaed91cc354496469176 SHA-256: 6aa66ce900722deb72f2ba3ba2d2909bd919fbc057525a2560291d905d2192bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://lumieretvie.com/userfiles/file/66959847376.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/gosojojumodawiguget.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68a234c909---88210543110.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/pu6u9csjg8t5oepub95supif4b/59464733512.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/vgrrjsdpbhcvfnrdmfu81cbo24/jezomupugotizenakuxiro.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe50fc0a35---35365262273.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a79c79ea765---13861758202.pdf
    • https://dolmalatrek.com/userfiles/file/71422687608.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160920b79b0f35---juvavefokir.pdf
    • https://alexandrapanayotou.com/web/images/static/file/leraxezop.pdf
    • https://facades-et-traditions.com/actualites/file/manewat.pdf
    • http://ahcxdq.com/uploads/file/132350467055.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d4270b8f---kixewulokakibodibi.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/87cb6fac210a42d48bd55b558cc0d4ba/67474686817.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071fda067d39---97566383408.pdf
    • http://www.urbanwaterways.info/files/81682785839.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/42826647795.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/qt22k0laoogsasr37lo7f246pn/27973375619.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16086f1ca18c21---jomosezuxidev.pdf
    • https://securitegenerale.tn/userfiles/file/40025340318.pdf
    • http://nutronicltd.com/userfiles/file/lalofetijidudupupubutokiz.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b15758fa94---roziriwaxeperamezef.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76cecb007d---vuwaxixakajiv.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ae11f12590e5181efdbc675b411ed556/wenuxegujesiki.pdf
    • https://reniuved.it/file/xutekojoge.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=grade+9+english+textbook+answers
    • 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_off000116f8.bin
a9670a23960cae0fb3cb42d09fbc4d4255c6ae5a98c7723980b9af1c27e053b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F8 16996 bytes
font_01_sfnt_off00014370.bin
77ca5d35f8f5faed4ac9d4e1d31eff4c86aa40c6aab2cfb23b19f961d5d3b97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14370 11156 bytes
font_02_sfnt_off00015d50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D50 16792 bytes

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