Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f60cafac0b3dca5…

MALICIOUS

PDF

290.1 KB Created: 2021-06-26 09:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1771c4b7571afc0c298f204e17699b24 SHA-1: dc3eb579306ccaf4d1d9986cfdc8d9d4a869068a SHA-256: 0f60cafac0b3dca58ff51ff07a51e38d5427092cb45eb591af3e3f35903a9acc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous embedded links, many of which point to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9699

Heuristics 5

  • 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.
  • 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://peaceinsrilanka.lk/userfiles/file/pogosiludurazupogud.pdf
    • https://thuaphatlaihoanghuy.com/uploads/files/dabase.pdf
    • http://inventory-acepipe.com/images/uploads/files/kimolatul.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/57691413724.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/5f385d536f41b26a0fbb8684856697a6/vexoxudituvefogaxoferilu.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fe1fedbae688ede17c135bf4cfaac32b/ratisusorotapiralikiz.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096541bece4f---67902257169.pdf
    • http://yacpa.org/yacpafiles/file/26703653728.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/c02cde28e5dd3ddb2b2ee87662052742/59931382979.pdf
    • https://aymsoft.us/aym_image/files/nepudufamevuw.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/3543f8cb6d066a284c39ff0a881b7688/22971261099.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/knkc524guakis6ovq3p6ouktbd/pixisokilerelesu.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c8d07024---42174526488.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceae83a2e1---ravaperigomularumipu.pdf
    • https://zemiigori.com/uploads/file/68389502246.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/91231755ef0c88c53baf9c2c1ab9263b/2057734954.pdf
    • http://habitat3.eu/userfiles/files/weraguzunesuxur.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f33be587c6---87504412148.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b45706be473---51703513337.pdf
    • http://sklepjola.pl/userfiles/file/tasafikibaj.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ab746b69d08009d595e64f16c9781db7/72548967872.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/90db39e9ac588097540179142fd853e5/60382683903.pdf
    • http://ahchala.com/img/file/21206237175.pdf
    • http://travelshops.pl/userfiles/file/valimitaxevolejukojo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=tocopheryl+acetate+is+it+safe
    • 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_off000417b5.bin
413a1dfca0bbfc2d37ed05e27f99bb561a6397fdbd4f42a94ffe2f1f92990613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x417B5 18792 bytes
font_01_sfnt_off0004499c.bin
5ea7c24bada415582fa43f2194a0804d3b887620bf8a8e5527cb0b445171c804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4499C 10552 bytes
font_02_sfnt_off000461da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x461DA 16792 bytes

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