Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0b4268594950e9…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 15:47:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1329af9d75ee355b2677d39acd659172 SHA-1: 26f276f3b8a2d078001b60922bfc93a3235a3818 SHA-256: bb0b4268594950e94b827c2e20ea8953cec121540d295db6827cf6c409bc8d46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'game hack' generator, which is a common lure for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious. The embedded URL points to a site offering 'free spins on Coin Master', further reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-spins-on-coin-master-2021-game-hack PDF link annotation
    • http://www.my-travel.com.hk/upload/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/pubg-uc-300_GM1330123889.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-no-apps-needed_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/tampermonkey-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hack-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-tom-get-games-free-roblox_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_002_off00003097.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3097 22564 bytes
SHA-256: 8c2b75a9200d55d546c47fe42c6210d69365a168e14d206fab59ab5b818f63ab
font_01_sfnt_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 18740 bytes
SHA-256: 0260418c40462ede441e23edbbaa28f8ef5f7472ee43e2d563702d50e072c039

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