Malicious PDF — malware analysis report

Static analysis result for SHA-256 233ad24978ab6dec…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 09:44:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 34f7b8f706c7e8bcf0ff608ca546a2a7 SHA-1: ef6bc62214b7934e0c5ea4b66c810a84e7edb140 SHA-256: 233ad24978ab6dec0ce6e32037da78dbd55da693600d4b488d6b9d434717d7e0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/what-do-points-do-in-roblox-game-hack PDF link annotation
    • http://mittlenberg.ch/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://mittlenberg.ch/images/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/todays-free-spin-and-coin-links_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
stream_003_off000048a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A3 25624 bytes
SHA-256: 1e29541147ee7d5f11d093e15bffede351eebf8390b9106662af513b1874028d
font_01_sfnt_off00008212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 18920 bytes
SHA-256: b7b86ed324264c44522b23f0c2231fa68c55c0eee51ac73e12797fae7dfada6e

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