Malicious PDF — malware analysis report

Static analysis result for SHA-256 65307605e48b06ac…

MALICIOUS

PDF

142.7 KB Created: 2021-06-30 15:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6b7d65e2e4d20f2d0af060563d15d48 SHA-1: dcfc8eeaa2736a029544489ed5bab8cb82e177c8 SHA-256: 65307605e48b06ac4e7a96753af82e06094630c7b233bc3c85363b7761cd764b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://wildpflanzen-planung.de/file/kakopiwew.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/aa26756bbc1d917d90ddb3e8f1c9f3a0/tatagamowelafarese.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7042a004fd8c36ce06df4d58ffdb9cb1/24717663028.pdf
    • https://larioenergy.net/uploads/file/27496638009.pdf
    • http://maternites-catholiques.org/ressource/site-image/files/vojulisijuxagaz.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160827846c7c57---xumenaridogawoxixowitovom.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073c5cb00f39---35534208948.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b77293e2e79---76589604544.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607daab0786b3---14393005938.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72dbcc91c0---dolozubutimaduxofupizeput.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/2c757ef1187c314dd9f0f1edfda36194/gedipewakutoveg.pdf
    • http://prime-standard.com/piceditor/file/89205519501.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760aac451e8---40542087695.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/phelkv248jsh8pre6vaj0mt7m6/dewepufazejaji.pdf
    • http://www.peretprod.ro/content-images/file/redabevuperupaxosafu.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab261c875f5---57765206999.pdf
    • https://ivanamihic.com//files/sefalosigilorutejelojid.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/346cd2b6bbaacb69ad679b706106d8f9/finewomipid.pdf
    • http://yoron.net/up/files/nepimedimake.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/btdirubaukc5vd8jlsiamqu0b0/93509865578.pdf
    • https://imotrading.com/images/userfiles/8627778396.pdf
    • http://csc-0898.com/userfiles/file/20210617183642_rc9zra.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b58c6fbb2ff---49375764948.pdf
    • https://lapalettedesarts.fr/gestion/file/64936827738.pdf
    • http://englandmatchshirts.com/assets/file/rarefizewe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=university+of+kentucky+track+and+field+recruiting+standards
    • 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_off0001cbeb.bin
a7a19fe47b9f7dc3a4399a32f863d6b3ae5ba87998c08cc40b4dbcec73ee8703
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBEB 17864 bytes
font_01_sfnt_off0001fa59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA59 16792 bytes
font_02_sfnt_off00021270.bin
9052be55deb9933112d80f212b2ae2bc0fda3c1d5e5f68ae74d210891af2064a
pdf-font-stream PDF embedded font (sfnt) at offset 0x21270 11032 bytes