Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d89e540cf70bf1…

MALICIOUS

PDF

70.6 KB Created: 2021-05-18 02:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e7f637d092b56560c5df3479b4ec1b SHA-1: 2c2cb1268579effb52c697c59b507d45b1b8bddf SHA-256: 86d89e540cf70bf19211f2ac6d8e59f0a5567164f7ad8de7e74307198e71e878
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a URL that appears to be a lure for downloading 'hacks for among us ios download'. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings suggest a phishing or social engineering attack vector. The ML classifier's high confidence score supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=hacks+for+among+us+ios+download
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/14db091556306200121e12f49d8566c6/13675715974.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/ada0cf8d9582c7caa6d90445b3f00ab3/87403580108.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bbeb7ef58---64772876283.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ukm4dhjoi8pth42g93amitfko3/48098119648.pdf
    • http://amadpich.com/userfiles/file/92906823969.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7b20ba8a3---safupapewizonege.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9cd100840.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089a1d5a4299---kowevafavakadafatagenas.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/d885c89357227c146df6676e926c2f9d/62401159852.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/c9f586b0ee19c7ea4a32d7fed56338c2/22587738471.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b74729ba2ab09e5ea2c2d97db7838de4/52109830315.pdf
    • http://akkoryazilim.com/userfiles/file/lefakiz.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/6u162vgc3otimau4lnpvfa87lk/80668976905.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/05563793d318f0130e311cbea7fef5c6/82450352966.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/gpei86dfqq94ephp5r3h9g38h4/rewejimotofaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d7b9.bin
80ad3a6ee77af6dd324c3d7e19fea3f5ef7334f3a47e7ef28190cd654a42d85d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B9 5456 bytes
font_01_sfnt_off0000ea44.bin
38e9fee9ba436a5e443add877658f3b82e519fe390b5a2f432a71dbcd8006d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 10432 bytes

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