Malicious PDF — malware analysis report

Static analysis result for SHA-256 3497f905d7360307…

MALICIOUS

PDF

44.7 KB Created: 2021-06-07 15:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 39b3d4b33d1804edcbc1cb416a02cfe9 SHA-1: d446127a5be92919ce4f143788749a3b918fcffb SHA-256: 3497f905d7360307838804a43ca4ee91402c10d56be989615bb6cd4a14dff507
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' which redirects to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of multiple game-hack related URLs reinforces the phishing attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-free-robux-no-survey-no-save-no-subscription-game-hack PDF link annotation
    • http://ipdrs.org/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-codes-on-roblox_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/robux-win_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-coins-on-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://ipdrs.org/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-zone-free-robux_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
stream_004_off00004df2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF2 26232 bytes
SHA-256: 74f7191823b669eccad33636195125e5d4c47d7580ebe68b409126c791bd0c0e
font_01_sfnt_off000089d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 19012 bytes
SHA-256: ed5e0420319c06784157a535f798845cf500143d93a76ecf90753edd6cb9fc1d

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