Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4064c0f7df45314…

MALICIOUS

PDF

72.5 KB Created: 2021-03-14 13:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ef05ee953d5ba73346f369637979e6 SHA-1: 6ea6d4128bdea9a64c3e44ff2bd51d7d2d1f4af6 SHA-256: b4064c0f7df4531458171d1dbfa1126ed791695b0aa58a24311a0c7f09743949
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, including one pointing to 'botokaw.ru/award', suggests a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing its role as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=casel+competencies+pdf
    • http://cashbackmoney.info/givomunadutejixudubogitqim2.pdf
    • http://nejupike.mygamesonline.org/laxesivalekozikeroruvub.pdf
    • https://static.s123-cdn-static.com/uploads/4461516/normal_5fdcb93d1d3e7.pdf
    • https://cdn-cms.f-static.net/uploads/4477892/normal_5fd97f9e1543f.pdf
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5fd08c3cd9c16.pdf
    • http://warupipujamoru.sportsontheweb.net/metodos_y_tecnicas_de_recoleccion_de_datos_estadisticos.pdf
    • http://pmaider.com/63231961413q57t8.pdf
    • http://fovoxarofej.getenjoyment.net/led_zeppelin_houses_of_the_holy_tab_book.pdf
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5ffb4075c2bee.pdf
    • https://cdn-cms.f-static.net/uploads/4450428/normal_60126a1254c63.pdf
    • http://wrinklestiltskin.com/canoscan_lide_100_free_softwarecene5.pdf
    • http://axecheat8.xyz/bemizovesowatavabodoponrkrzx.pdf
    • http://mists.space/japan_visa_application_form_sample_page_20xodq.pdf
    • https://cdn-cms.f-static.net/uploads/4462986/normal_603c74ec86f17.pdf
    • http://tifoxikutawe.sportsontheweb.net/35029277260.pdf
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5fdc131d7bf0c.pdf
    • http://biggymstoe.com/p._m._c._h_full_formkpxlr.pdf
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5fd130a75c80a.pdf
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60404c1acadd0.pdf
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5fd302a4e9d67.pdf
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5ffe88a8b15eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vekisofekibote.myartsonline.com/clear_mind_alternative_word.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_off0000df93.bin
90affa7ef4e4211dead57c5cd289f595fa168d5bd682042b69967c918f469c42
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 5108 bytes
font_01_sfnt_off0000f0e4.bin
0e3f4ff8f35ef013d143f9b7bdb67634510d2317a8901899847ad6cc5e29dff0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 10596 bytes