Malicious PDF — malware analysis report

Static analysis result for SHA-256 33bd227ec7b90bf0…

MALICIOUS

PDF

49.8 KB Created: 2021-06-02 21:58:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 58f4ce70c70e7e8ea409134552f49fe3 SHA-1: 5987092ce34b9ef89c9fff14219832e36ec406a7 SHA-256: 33bd227ec7b90bf03a33c6f871fb3cfc1f3308f2a0045c07812f701e6e9f27e4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-robux-give-away-everyone-will-get-robux-proof-game-hack PDF link annotation
    • https://inspiration-modellbau.de/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/robux-come_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B4 26468 bytes
SHA-256: e2d4d324af2217f5e6ea51e2a6ed578498220b3b1113cc5fc8689b5a05d12e26
font_01_sfnt_off000092ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FF 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEA 19352 bytes
SHA-256: 3cd97ea1b7303e4c018d6ed3ff877cc6dac1e139e219a03db93f66c28b53d990

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