Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db2afa8a3feb2e0…

MALICIOUS

PDF

216.1 KB Created: 2021-03-23 03:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ada9ba8b2d4a86d25e82ed56b4a0db20 SHA-1: 4cc044d1ca7488bdadb66dc72999d91cf31922aa SHA-256: 9db2afa8a3feb2e0afda3bf4aca4bae238a5e3b5a7dae31ec20b78c0ac48e264
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. Heuristics indicate the presence of external URIs and a ML classifier flagged it as malicious. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to academic papers, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://bologen.ru/award?keyword=ieee+papers+on+augmented+reality+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5fccd144dadba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_602d7f119be8d.pdfIn PDF document text
    • https://vemesefopega.weebly.com/uploads/1/3/4/6/134684253/8044923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_6024155815484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fd9be050aa88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_604b926cc9e7e.pdfIn PDF document text
    • https://gosevitugelaw.weebly.com/uploads/1/3/4/4/134439416/769e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6013bd9836d28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469126/normal_604466f5191fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471238/normal_60592bf91d75a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_601f8eb875728.pdfIn PDF document text
    • https://cdn.sqhk.co/datisafapuv/Tiiiajh/werugopubomomixeradupudim.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/defanetimexiwusozu.pdfIn PDF document text
    • https://zupawifotifawe.weebly.com/uploads/1/3/4/4/134480263/9674138.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/KbigibB/likee_logo_aesthetic.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/PUoPhjt/paris_texas_zip_code_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_e89f98365e384210bc0563bb4da3101a.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_dfeae5e8f7764b30bdf48b66b30ce63d.pdf?index=trueIn PDF document text
    • http://fexewon.rf.gd/zesasuse.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_669baa70809344a0af1fcc5359f01fac.pdf?index=trueIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_a394827eda7a4187bc8625d7b66c7198.pdf?index=trueIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_7a97ae5875d14040a8ad581ab91e4204.pdf?index=trueIn PDF document text
    • http://xevotoxukapo.epizy.com/aashiqui_2_audio_songs_masstamilan.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000308cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308CF 2912 bytes
SHA-256: ca76997379172eee33085c8482c7323aa4c6490e5d9b0518affecd078e7eaab7
font_01_sfnt_off0003132b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3132B 5400 bytes
SHA-256: 37cf6262022cf9aef63cff4373d42f95f96178edc2b570758ab3ef420c95360a
font_02_sfnt_off0003257a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3257A 14180 bytes
SHA-256: 380f89a8e7d1ce9207c38d0a97e3701dea11e8f0193d72938f2d8089c44c6c45

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