Malicious PDF — malware analysis report

Static analysis result for SHA-256 389ae066ce358b68…

MALICIOUS

PDF

96.2 KB Created: 2021-02-25 13:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 37b4079e037f09e4169756ad37a50827 SHA-1: 6e0872eccbfec183994f2f62596d7923ab89efd3 SHA-256: 389ae066ce358b681e77c45fa5b309714ff1f1d921f95448b3637f858016edbf
104 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is malicious, including a ML classifier flagging it and ClamAV detection as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Focusrite scarlett 2i4 2nd generation drivers', suggesting a lure to trick users into downloading malicious files. The presence of external URIs and embedded URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=focusrite+scarlett+2i4+2nd+generation+drivers PDF link annotation
    • http://giwapozolaleg.mypressonline.com/teaching_how_to_write_a_thesis_statement_middle_school.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373797/normal_600844567b973.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/K1hd7hi/31114895033.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/igfxghf/samurai_vs_zombies_defense.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/song_of_solomon_summary_chapter_5.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/fovogup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_60166e3c3192e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_60173465a7e63.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/nadodolexuriwib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369331/normal_5ff7760833f15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bms_college_application_form_2019.pdfIn PDF document text
    • http://duvodix.myartsonline.com/how_to_charge_timex_solar_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/bixozenuk.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/report_nuisance_calls_sky.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/59779480968.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_off00012b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B98 3112 bytes
SHA-256: 8106a96dc3c7614d4bd73c7d47b18b569d5df1065b27de6b56bccc903e72c728
font_01_sfnt_off000136b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B9 5344 bytes
SHA-256: f7e0ff156a17c321317c6d08048578af1d62da3adabc514e7b5f745065cf38c3
font_02_sfnt_off00014904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14904 12228 bytes
SHA-256: fc5b5f1532757d7f037de0ef0e0dabcf229337ba53f04d173f9de7afc6afdaeb

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