Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb095a99d27ec495…

MALICIOUS

PDF

73.9 KB Created: 2021-03-31 12:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 420b7d15eeb15fa7d4328f98a0b55432 SHA-1: d41db575b662e29c9e4026fce9763743e9fafef3 SHA-256: fb095a99d27ec495766e8ae2146f328820dbf63cc481cd6eb5c55ed8bc7ab9fe
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. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF structure and embedded URL suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=pediatric+bnf+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4411916/normal_60498bb5f239e.pdf
    • https://static.s123-cdn-static.com/uploads/4479925/normal_5fff539ec006e.pdf
    • http://subbellassecret.com/215118231459nh19.pdf
    • http://thiswaytovogue.com/599975664057nrae.pdf
    • https://cdn-cms.f-static.net/uploads/4500430/normal_600e9489703c6.pdf
    • https://static.s123-cdn-static.com/uploads/4405654/normal_5fc56eb646fa0.pdf
    • https://cdn-cms.f-static.net/uploads/4445743/normal_603918db9439f.pdf
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5ffb28fe50df2.pdf
    • http://premial.su/matematicas_financieras_unamoys3n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wazikaje.rf.gd/adjectives_in_french.pdf
    • http://wokoguzesel.rf.gd/hoover_steamvac_carpet_cleaner_how_to_use_hand_tool.pdf
    • http://vipaviveza.epizy.com/jusabezusa.pdf
    • https://s3.amazonaws.com/zerejibixupav/92217315454.pdf
    • https://s3.amazonaws.com/dewutexorob/2004_dodge_ram_1500_heater_problems.pdf
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_71261190e4f3400487e5af9dd32dace2.pdf?index=true
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_4212af11620a4a7a9d90398a1370334c.pdf?index=true
    • https://s3.amazonaws.com/fejififimaketo/xoxuvona.pdf
    • http://besipopi.epizy.com/android_wear_iphone_jailbreak.pdf
    • https://s3.amazonaws.com/tamobalasu/95052193266.pdf
    • https://300a1258-3b13-45f7-80b9-bd8966f45320.filesusr.com/ugd/81888a_25696b111fde461bb270db44b45f41a5.pdf?index=true
    • 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_off0000e1d7.bin
fa612ca2e9b80d7550880fc0bbc6da5e7007db1066f51e802155bfb5ecafd002
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 5352 bytes
font_01_sfnt_off0000f417.bin
269635e9ca8fa71620d9094cf9841e733fd45717d0216b70c26dedf170f17a9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 10916 bytes