Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80fc261a64cf7d3…

MALICIOUS

PDF

86.8 KB Created: 2021-03-09 22:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52078d81998bfe7d9df27cf6e8e56dcc SHA-1: b2fed85956b2b64218ad16c1e277b3810f227de0 SHA-256: f80fc261a64cf7d3f9ce3c5e07af8860dde09a32f6e258ed870eab44e09f034a
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to a suspicious URL, suggesting it's designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely using embedded JavaScript for execution.

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://ponafet.ru/strik?utm_term=general+chemistry+linus+pauling+pdf+download
    • https://static.s123-cdn-static.com/uploads/4446287/normal_600351102d14d.pdf
    • http://xodokevazijif.22web.org/jesejala.pdf
    • http://balonedud.iblogger.org/buvosijupur.pdf
    • https://cdn.sqhk.co/libewepigux/1M1Lge4/55878965974.pdf
    • https://cdn.sqhk.co/kubepugemaki/ygeUNaw/can_you_answer_private_number_plate.pdf
    • http://talebakela.iblogger.org/adb_driver_installer_v1._0.pdf
    • https://cdn.sqhk.co/wamamuli/Egecej2/28635653611.pdf
    • https://static.s123-cdn-static.com/uploads/4470020/normal_5ff61512900cd.pdf
    • https://cdn.sqhk.co/puxolika/b3miiPt/zombs_royale_aimbot_android.pdf
    • https://cdn-cms.f-static.net/uploads/4469106/normal_5fdb941db3e3b.pdf
    • https://cdn.sqhk.co/gubogezemazo/hwaheBv/transformers_robots_in_disguise_toys_strongarm.pdf
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcf329232448.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_b156d21d0d284efa925b90fada66e5fc.pdf?index=true
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_215ec4ca4fb34dce96e0c5e4b0104e20.pdf?index=true
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_bde2701d0e5747659bb4693cec11a469.pdf?index=true
    • https://s3.amazonaws.com/musoxifuvitalo/mifovewidefi.pdf
    • http://datupawop.epizy.com/gulomasagazosipudixafe.pdf
    • https://s3.amazonaws.com/padosumifubobo/14th_finance_commission_guidelines_in_gujarati_language.pdf
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_e7e7789e0f5b49dfa4862f7b74c89b23.pdf?index=true
    • https://s3.amazonaws.com/jepavilutabilel/xeleto.pdf
    • http://tiliwadovi.epizy.com/63236882644.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_off000113eb.bin
4531cc58b7b8730c698b08a0877a71ba9be17df565f6c2605016c2f5f287fbee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113EB 5792 bytes
font_01_sfnt_off00012795.bin
996a2d7f6a8812f1b29d0cdc063a137d2f9acc8f5fc23ddce10ddc6e639bfc3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12795 11268 bytes

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