Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7eee899f86818ef…

MALICIOUS

PDF

87.5 KB Created: 2021-03-29 23:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e11a843aed64644c95d8b28abd4b766c SHA-1: 89fe596c8e0ab324da0f769ec802f437064099aa SHA-256: b7eee899f86818efc5c34d279cb8d99f6d109b9c8549a5e2140cfa62f1bb53cf
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'Starsight brandon sanderson pdf' to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=starsight+brandon+sanderson+pdf
    • https://bisijonowazupu.weebly.com/uploads/1/3/2/6/132682684/deboxarajubiwobix.pdf
    • http://ulekschool.online/como_colocar_o_pc_em_portugues5fus0.pdf
    • https://cdn-cms.f-static.net/uploads/4481062/normal_603d1d62331a4.pdf
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/5341684.pdf
    • http://top-shop-store.website/star_wars_legion_army_builder0dds8.pdf
    • https://static.s123-cdn-static.com/uploads/4378152/normal_5fde1ce21bd04.pdf
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5fc6bea36a125.pdf
    • http://erkutungotu.com/majin_build_xenoverse_232x1b.pdf
    • http://neo-tp.ru/515173092839wubl.pdf
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/denuku_farugeraforutok_rejelawasevi_tojavijabera.pdf
    • https://cdn-cms.f-static.net/uploads/4374857/normal_600bc5fb07d1d.pdf
    • https://ratemalopez.weebly.com/uploads/1/3/4/7/134753477/817fa13.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/baxunaf/farimowukujat.pdf
    • https://uploads.strikinglycdn.com/files/5f821763-7cfc-4934-9857-b1bd609257ab/kenmore_elite_he3t_steam_washer_code_f21.pdf
    • https://uploads.strikinglycdn.com/files/4f2aabb2-181b-4c86-be1b-1ae280ed001e/bajar_musica_mp3_gratis_para_celular_samsung.pdf
    • https://uploads.strikinglycdn.com/files/01f3193e-b6b2-4286-b518-d7d4dbf320b2/48763467278.pdf
    • https://s3.amazonaws.com/nazekisigiduz/creative_writing_worksheets_for_grade_6.pdf
    • http://gokujipavelidaz.rf.gd/74225616101.pdf
    • http://silimevi.epizy.com/detroit_become_human_pc_full.pdf
    • https://uploads.strikinglycdn.com/files/a8fd8f31-157c-4d8d-b8aa-ff270f9dc363/43715504509.pdf
    • https://uploads.strikinglycdn.com/files/76a08f35-abfd-4869-b871-b684257a58bb/economic_development_jobs_washington_dc.pdf
    • http://borovob.epizy.com/jikisi.pdf
    • http://rawopewudoj.rf.gd/10649561321.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_off0001182f.bin
31e2ff9c67511b4711b21e08491921793f005dbbdbd6c45c4c5bebc66e83ac81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1182F 5512 bytes
font_01_sfnt_off00012ad7.bin
04dac8e9ec4880deb1a41a4af539850d45f0ee7c914c646a7110c37cd1a0cd6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 11108 bytes

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