Malicious PDF — malware analysis report

Static analysis result for SHA-256 669515e446f3816c…

MALICIOUS

PDF

79.0 KB Created: 2021-04-07 01:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b2a513833dce7670b4b1001e024dbbc SHA-1: 205e67e96fc31ba29ff86e624017175d252f2cf9 SHA-256: 669515e446f3816c6cefab9b7612f0d95e0f5811bbf4103e843d91598b5c1506
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'resalured.ru', which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, contains keywords related to a search query, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/wix?keyword=sherita+dixon-cole+breathalyzer
    • https://cdn-cms.f-static.net/uploads/4495413/normal_60201a7b39b7a.pdf
    • http://vulufinagi.mypressonline.com/tabla_equivalente_de_pulgadas_a_milimetros.pdf
    • https://cdn-cms.f-static.net/uploads/4416786/normal_602ae721a7ce1.pdf
    • https://static.s123-cdn-static.com/uploads/4453718/normal_5ffe17064bd45.pdf
    • http://mitimewigupito.mypressonline.com/como_beber_agua_de_mar.pdf
    • http://bagomebefekixob.getenjoyment.net/asus_z97-a_m.2_sata.pdf
    • http://dusipoweg.mywebcommunity.org/download_livro_temperamentos_transformados.pdf
    • http://fibiver.mygamesonline.org/65215384422.pdf
    • http://savineme.mywebcommunity.org/33938862635.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_601090999b59a.pdf
    • https://static.s123-cdn-static.com/uploads/4454671/normal_5ffe673b675a5.pdf
    • https://cdn-cms.f-static.net/uploads/4378605/normal_604f647e4e1cf.pdf
    • https://cdn-cms.f-static.net/uploads/4501791/normal_5fda34542e5f8.pdf
    • https://static.s123-cdn-static.com/uploads/4372740/normal_5fd04832efda9.pdf
    • https://cdn-cms.f-static.net/uploads/4460461/normal_605420157e2f3.pdf
    • https://cdn-cms.f-static.net/uploads/4388819/normal_602b46d2b4d01.pdf
    • http://vozuzutiwajuzip.getenjoyment.net/what_is_neuropsych_testing_for_adhd.pdf
    • https://cdn-cms.f-static.net/uploads/4379034/normal_605140c2ba3a9.pdf
    • https://cdn-cms.f-static.net/uploads/4404308/normal_605bb462042ad.pdf
    • https://cdn-cms.f-static.net/uploads/4365653/normal_6043ec20a3e72.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://doriponesarom.myartsonline.com/61067155542.pdf
    • http://woranuganavot.myartsonline.com/casadio_dieci_a1_manual.pdf
    • http://zedofaxuboz.onlinewebshop.net/dasesaretorujamedibefone.pdf
    • http://bitines.myartsonline.com/advanced_java_programming_tutorial.pdf
    • http://fojosotum.myartsonline.com/saxojotunofezalebikoze.pdf
    • 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_off0000f5c4.bin
f3b07120529ce9d0ee2f7f08423112f2ee20b566b3c87d6bac42afcb9a8b551b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 5344 bytes
font_01_sfnt_off000107fd.bin
dd54d05959c220cab8bb1199136f9aed047550c65664c8601c51e458a4e62fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 11244 bytes

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