Malicious PDF — malware analysis report

Static analysis result for SHA-256 109f1dcf63a34cc4…

MALICIOUS

PDF

48.5 KB Created: 2021-05-17 07:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b67553c2697a8b4243909eb19c103447 SHA-1: cba38913375d8b00023ee71ddf7cf0c4d7065062 SHA-256: 109f1dcf63a34cc42960de3a8149668fe70ec4627234edb9cb51e50bcda03564
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free Robux' and 'game hacks', strongly indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-codes-2021-game-hack PDF link annotation
    • http://advancedaudiosystems.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/earnrobux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/mathep_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A95 25888 bytes
SHA-256: f30f5b5da00a28b852c897d92476f9e33b7ee84897188169aefea0df23c8c662
font_01_sfnt_off00008768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8768 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off0000994b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994B 18856 bytes
SHA-256: 204886f9a3a3d456a8ba924f34e84de86e5dda13901e78a872ce278a746af401

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