Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2487dc2c42b65b…

MALICIOUS

PDF

73.5 KB Created: 2021-05-16 09:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf21866a4be313968992b689c320c4f5 SHA-1: 270a664e56e648116dfc518522a39bdf746002c4 SHA-256: ff2487dc2c42b65bba99600d581c79cf12a5d8ce7f75b868341b9e68aefb3b44
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to suspicious PDF files hosted on compromised websites, suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs are strong indicators of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/51cb1da06e86934a63d40d82268f1f87/65162680591.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/fk12re8vunqcpikv8eo7mh71s8/ronomawisudubelitum.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/c51267956e1ef34e0378fe6b43acbe00/91338124619.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/0j5md8tocbiahr0o3ccc61gfb5/nitinenaxozixaxuw.pdf
    • https://ivanda-commerce.hr/userfiles/file/jamojuwikij.pdf
    • https://aawyx.com/sites/default/imageuser/file/50805781293.pdf
    • http://appletechsolutions.com/userfiles/file/66182116019.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be76dad611---88620774427.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/h6282n34svb9s7ogv78u6td7uu/98777009356.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076821fd1dd6---9384945361.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/af6c1d2c9418817cf9ab4032e27ec79b/91108013490.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/b30c4a3a62201ec8c92f85042748bd46/20771419364.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160793d12b9559---49348241510.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160825cf81bddf---pijisoguxokasowaxe.pdf
    • http://93564497.com/userfiles/37570043605.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/9aaf6dfa4b67bf860a2e114809e21534/34883961952.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/e409a63b3f1926dc8b50960a087ce0e1/jevazukafakubaxin.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/22f7e0f31a77929cc6d971afb3448cef/tekelopilutirakajemamu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=reply+to+resignation+letter+template
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a7.bin
8294217028e016f427de42de7826641214874b7d9899ba23e7be2b71056a2c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5248 bytes
font_01_sfnt_off0000f47c.bin
42f0859219fdb9c04fe2fe31bdca9af54eca5c7019362c1143c28d003a207a2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 10664 bytes

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