Malicious PDF — malware analysis report

Static analysis result for SHA-256 070f18004bb3b0b0…

MALICIOUS

PDF

86.5 KB Created: 2021-07-02 12:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44936f906d5d75d59f93fe94d0015e5d SHA-1: e36e41e8e0b55c7e002db6784a2359585af25a5a SHA-256: 070f18004bb3b0b0b650685cdc81a54b3722b22b4947b0ad5fc5c28cc87269f4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as redirects for phishing attacks or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ud5684np1aqm61b2qf66hebbb1/xikegin.pdf
    • https://angkorphotographyguide.com/userfiles/file/lujipovipib.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/5tprmk42mg7edlstq2nkdli9i1/19362775792.pdf
    • http://gemculture.com/userfiles/file/mobal.pdf
    • http://tomaszskiba.com/userfiles/file/13692997954.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/4fda74ff902efc3b5d2b60b2a413e48e/jetupifemepujudisuxomaja.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/1dat3r712eo425dfn8qtbg5p1r/bozawaxufarazun.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3b44af988---raranixevojapivugekuni.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0eb62384---wozilo.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b83bb68708d---xemidofanogeriwivuvuvo.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077213a637fe---15594017535.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/90d0642eb71c50198e642d45b2f79816/71615919765.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/8a1a869918d18e4ac3a68c36005f3a00/95578094609.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079dbd8e59da---zibewodomotetapegole.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094a34835407---35708827489.pdf
    • https://barrierball.cl/ckfinder/userfiles/files/90642857092.pdf
    • https://moveo-sport.pl/userfiles/file/71469708905.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/3fjhh96g668ffan75f118rtpej/60318657732.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160da577d29c9a---29920423402.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26ee93f104---kogurapaxumekukulekabobe.pdf
    • https://familienarbeit3plus.ch/userfiles/files/pezojotozigikiwajeg.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/eprgghg7oml4jil9au5m0ptfuo/56127762934.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/85377963707.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=60+divided+by+3
    • 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_off0000f175.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 16792 bytes
font_01_sfnt_off0001098c.bin
894c91e015d1a7a7b4ea936dec0e038f9bc0d3fb02505a7abe3c59e420e918af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 10128 bytes
font_02_sfnt_off00012041.bin
aed45cc50f5ffe5b96cfe5f3b2268e7e6c601b9d84fc86c3c292a2902f7622ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12041 17076 bytes

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