Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d13d0ad720beea…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 10:53:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 16e32018136ca4dfe049d97f1131b936 SHA-1: 55f77a206592d95b35e4984f0544fa5d958e8dcb SHA-256: 32d13d0ad720beea7d872379607ab25661c43c20db4c7613068e19c8caf6a3c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary redirector URL identified is http://netcdn.tw/app/431946152/bloxland-earn-free-robux-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/bloxland-earn-free-robux-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-gamepasses-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-to-use-roblox-renders_GM431946152.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_off00002f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F53 22660 bytes
SHA-256: 19d024167e7e7b461f08a3acea6f39a7dfc962c873a7803d8acb9d1fade00960
font_01_sfnt_off0000622b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 18964 bytes
SHA-256: e1def2a9526019231b9d88ec7edfc28da13730703cf387a4434b27a982203b29

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