Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bfa87c301d4fd1…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 15:55:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a47dd01367108e836b5a8a8b9e8e7dd9 SHA-1: f39d1211e2e8e041c8b311ba34d777c430693d4f SHA-256: a7bfa87c301d4fd1700061273884f92fa5187fb1dfe0d97ca871e0f1bd0aaa2c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with a primary focus on 'game hack' lures. The heuristic PDF_GAME_HACK_REDIRECT_LURE strongly indicates a social engineering attempt to trick users into visiting malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.tw/app/406889139/coin-master-hackcom-xyz-game-hack PDF link annotation
    • http://perpustakaan.iaiqi.ac.id/repository/super-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/rhow-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-legendary-swords-rpg-level-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/rbl-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/wearedevs-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/cheat-engine-roblox-shut-down_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-superhero-city-money-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/hilton-hotels-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/robuxian-robux-hack-prison-klife_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/can-i-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/omg-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/earn-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316B 22700 bytes
SHA-256: e58af0dc3f74e9040ffd3f8e7a7a0890e6802a855f588c212a6738b536ae6911
font_01_sfnt_off000063ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 18752 bytes
SHA-256: 06ef631afbecbc1b5b7dcb8b3eb929a8944b6eea579e5c003e5febb126385d8e

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