Malicious PDF — malware analysis report

Static analysis result for SHA-256 458bf82f6a5894ae…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 04:44:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3dbf5fe7744c85d7ab0d6a50a834f2f5 SHA-1: 085001a605ea6d7d85e3df68a1bc74661f07c99a SHA-256: 458bf82f6a5894ae04ec99e12ee8c57fd03a6f066d57b5c2a357c0e2f0b5d190
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'free generator / game hack' lures related to popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the document body reinforces the lure by mentioning 'Free Clothing On Roblox'. The primary URL, http://netcdn.tw/app/431946152/free-clothing-on-roblox-game-hack, is likely the initial landing page for a phishing or malware distribution scheme.

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/431946152/free-clothing-on-roblox-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pokemon-go-free-trade-evolution_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/raindrop-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-wizard-life-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-get-free-rocket-fuel-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-real-2021-500_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-speed-hack-for-pc_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-gamepasses-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-pour-avoir-des-robux-facilemen-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-card-collection-hack_GM406889139.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_off00002f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1F 22448 bytes
SHA-256: 1cf23affc1873ff2770b8886cdb67d6ba314367e7ce285b736d2bf162a30bccf
font_01_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 19040 bytes
SHA-256: 91f50e35acf681a7c747939e3f9b2bbafebc71fb362ec7e3261ae1ae26f4098a

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