Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7d219da5c1e15a…

MALICIOUS

PDF

76.4 KB Created: 2021-05-17 22:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ba29feeff65990835cc355f276abee SHA-1: 27fc4c23a51ffe0737521c59dd0076d5d108e84a SHA-256: fe7d219da5c1e15ad1dffdcaeb4bb0d5fd4436b938fea24c701ca13e3befcb7e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to educational materials, aiming to trick users into visiting the malicious URL.

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://nipisod.ru/strik?utm_term=go+math+book+3rd+grade+answers
    • http://wofoweniwer.iblogger.org/second_life_avatar_obj.pdf
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/xanerofaj.pdf
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/gidilirududibosapamu.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_60445a152efb5.pdf
    • https://sokowerifali.weebly.com/uploads/1/3/6/0/136053586/48f2b.pdf
    • https://static.s123-cdn-static.com/uploads/4372101/normal_5fc580c8e63f2.pdf
    • https://cdn-cms.f-static.net/uploads/4485318/normal_6056ba640ad91.pdf
    • https://static.s123-cdn-static.com/uploads/4392193/normal_5ff27c764631c.pdf
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/puluzel.pdf
    • https://cdn-cms.f-static.net/uploads/4403140/normal_60149345e2c58.pdf
    • https://cdn-cms.f-static.net/uploads/4483854/normal_6061849c1fc87.pdf
    • http://mutugupepu.iblogger.org/dutin.pdf
    • https://cdn-cms.f-static.net/uploads/4391599/normal_6017af2e20fe0.pdf
    • https://takojetomegupaj.weebly.com/uploads/1/3/1/3/131382497/xajexu_pokarilotukanaw_taxulifaralal_didorabile.pdf
    • https://cdn-cms.f-static.net/uploads/4373240/normal_60469f3e8b6f5.pdf
    • https://cdn-cms.f-static.net/uploads/4477173/normal_601f9a151f34a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/liluvad/how_do_i_clear_the_memory_on_my_omron_blood_pressure_machine.pdf
    • http://fanunif.rf.gd/affliction_warlock_arena_guide.pdf
    • http://bitumexupun.epizy.com/jivutapuzi.pdf
    • https://s3.amazonaws.com/fedufiporara/que_hace_un_mecanico_de_piso.pdf
    • https://s3.amazonaws.com/tidigudetefumof/fabanasi.pdf
    • http://nokakegobowu.epizy.com/chrome_components_adobe_flash_player.pdf
    • https://s3.amazonaws.com/fedure/67911396059.pdf
    • https://s3.amazonaws.com/jemisajoda/energy_australia_complaints_form.pdf
    • https://s3.amazonaws.com/juliziwojatige/samsung_software_update_tool_free.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_off0000ec05.bin
950dc40bbdba9b9b10aac5b9aa83f411c0c41adf0f59d52c52cadf2ce33d3db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 5696 bytes
font_01_sfnt_off0000ff45.bin
c9c956f56fb1d6359098d646cc9dce83e1e4d1d825fe4fb786c19645857f7b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 10656 bytes

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