Malicious PDF — malware analysis report

Static analysis result for SHA-256 776ca43f9d555376…

MALICIOUS

PDF

43.6 KB Created: 2021-05-11 19:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e3f918b23c3160634f0ea2b8a56b0278 SHA-1: b3ac68ade35fa35263f50a9cafab6a2f9d249ecf SHA-256: 776ca43f9d555376cc5bc71d5bb72f010213ca7d1c339feb8bbaa37f56d03ee6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or social engineering attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-robux-easy-2021-game-hack PDF link annotation
    • http://mittlenberg.ch/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/master-free-spin_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://mittlenberg.ch/images/minecraft-coins-free_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
stream_003_off0000490c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490C 26808 bytes
SHA-256: f16ff342bee5a33d857815119995569318cfd2071ad33d4671316a03791434ee
font_01_sfnt_off0000859a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859A 19092 bytes
SHA-256: b4f5bd8c8985fe06cb8cafea7c6a35db41ab3230d9b691422e9309a9df735677

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