Malicious PDF — malware analysis report

Static analysis result for SHA-256 4798d1a9f6366719…

MALICIOUS

PDF

79.7 KB Created: 2021-03-20 21:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af6d313d3e5f52353256bd2600e4950 SHA-1: 7c125cdff23e8d86d7f95e44d1312e1b10b3da64 SHA-256: 4798d1a9f636671969bce39687511d7c22fa202665be2aa15794c50b97f17f8f
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 malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'aviation security mcqs pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=aviation+security+mcqs+pdf
    • https://cdn-cms.f-static.net/uploads/4403541/normal_60342915a637e.pdf
    • http://fidafevemikiwe.mywebcommunity.org/19677604030.pdf
    • http://tesilav.sportsontheweb.net/data_structure_and_algorithms_using_python.pdf
    • http://duzusedolatepe.mypressonline.com/iso_9001_certified_meaning.pdf
    • https://static.s123-cdn-static.com/uploads/4376866/normal_5fe3dc3176bdf.pdf
    • http://dkblogin-de.best/42808550014lbf6m.pdf
    • http://raifaisentapp.online/bookmark_nitrojw6vu.pdf
    • http://axecheat9.xyz/vieta_jumping_examplesv25s8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66bf7058-7769-4b2a-85ce-eb5e1bb3ed30/tuxajogurefizigenox.pdf
    • https://s3.amazonaws.com/sebunuzu/lean_prioritization_matrix_template.pdf
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_c97409ce9f904a8e97a772d6c5ef5f5c.pdf?index=true
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_6103f2d3e4b0464cb15bf48c172db64c.pdf?index=true
    • https://s3.amazonaws.com/varoximu/45444256820.pdf
    • https://uploads.strikinglycdn.com/files/40f59436-8c40-4e5d-b4df-3e28f346f577/black_and_decker_edger_trimmer_cordless.pdf
    • http://pupagerirawax.myartsonline.com/i_robot_vacuum_cleaner_review.pdf
    • https://s3.amazonaws.com/wuzalugiseto/article_analysis_worksheet_science.pdf
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_3311d2da63ac4834aa65cc6470defe4e.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_off0000f990.bin
060568517895d47c955e95c5daa8ec7c9656f6f0939ac92257d1f0453c11ba0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 5544 bytes
font_01_sfnt_off00010c6a.bin
defe811a2f12113ed5c2c20e6441e065641ce4cc8d8f8d18b5d9289d6a799364
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6A 10948 bytes