Malicious PDF — malware analysis report

Static analysis result for SHA-256 8888c93dc152c04e…

MALICIOUS

PDF

80.5 KB Created: 2021-05-04 09:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f60151e014c923946805853766e25ab3 SHA-1: 282a3c266aa5aef9efdbe5149e0755e5375f2c95 SHA-256: 8888c93dc152c04e76a05f651d0ce55c4f570afa17dda055d9227ebc510f0fa4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'botokaw.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to academic reading material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=cultural+theory+and+popular+culture+a+reader+routledge
    • https://cdn-cms.f-static.net/uploads/4407733/normal_60443e4ac4451.pdf
    • https://static.s123-cdn-static.com/uploads/4384851/normal_5fc75ac2c104e.pdf
    • http://esclick.pro/craigslist_ny_cars_parts_by_ownerpqa8z.pdf
    • https://static.s123-cdn-static.com/uploads/4530457/normal_600702062953d.pdf
    • https://cdn-cms.f-static.net/uploads/4387826/normal_6065ee08ec833.pdf
    • http://wepegudefagixu.iblogger.org/the_lion_the_witch_and_the_wardrobe_series_movies.pdf
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6057b44081884.pdf
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fe9348b4440e.pdf
    • http://idealicaitalia-ufficiale.site/401056212796ajf8.pdf
    • http://datingdate.site/42614237047zc8xh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wetowotupime.rf.gd/bucknell_university_campus_map.pdf
    • https://s3.amazonaws.com/vofadoloves/best_natural_dryer_sheets_for_static.pdf
    • https://s3.amazonaws.com/paxuvagal/coronary_artery_disease_treatment_guidelines_2016.pdf
    • http://worutagoza.rf.gd/xunodawizofugotatok.pdf
    • https://uploads.strikinglycdn.com/files/5eb5f701-701b-45ef-bf8b-bd18d4a79ec4/84948048283.pdf
    • https://s3.amazonaws.com/nutanigonu/if_not_winter_fragments_of_sappho.pdf
    • https://s3.amazonaws.com/xisakazelelinim/how_to_get_a_pro_bono_family_lawyer.pdf
    • http://vofoxefubi.epizy.com/51464856298.pdf
    • https://s3.amazonaws.com/kitakilesa/icse_biology_class_10_book.pdf
    • http://tawurogaxe.epizy.com/abecedario_ilustrado_para_imprimir.pdf
    • https://uploads.strikinglycdn.com/files/ed532441-7c63-4b2e-a97a-7e49852956c5/sigakigev.pdf
    • https://uploads.strikinglycdn.com/files/4d5ac36c-8a75-4207-864a-62ebc6e6a58f/dizitexazopugumonubi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa9.bin
62405cc908a06a39dc7f39f3c17d3a44b8e6570f9e1b5ef860fa9526c3de1b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 5120 bytes
font_01_sfnt_off0000fc8b.bin
3d9287d9cfa2089c6695a5f47e131ace4c2c72c0570aedb30b87c13770c45379		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 5164 bytes
font_02_sfnt_off00010e1c.bin
2c78ae70494d3affd48a0f4a6b1bf63beca050a43fdd796c6cbfed3a599404a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 11256 bytes

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