Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3fefc1341d12b4…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 13:40:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6fb48fbeab0eadd8dfa8c61f54952574 SHA-1: 4035e8909c2cd0b328f29705783f9935337c916c SHA-256: ec3fefc1341d12b406eb443ac8e56b551397b9ec1aca1e54e61efa4832a5ceed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and lure text related to 'free coin master hacks' and 'game hack generator'. This strongly suggests a social engineering tactic to trick users into visiting a malicious website. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coin-master-hacks-game-hack PDF link annotation
    • http://sbm-nn.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-spins-today_GM406889139.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_off0000497d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497D 24756 bytes
SHA-256: f738cbaa56113fa23eea7239c498112148d79e568c3c0b4d9b0a8bc02588cee3
font_01_sfnt_off0000829b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829B 17880 bytes
SHA-256: e9d83edb2e1b044691ef11a4057c4d6cc11a4a50971021398c2c06fbe5537458

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