Malicious PDF — malware analysis report

Static analysis result for SHA-256 691ca971771297c7…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 13:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3fa4e37d11238c655a5cfc311e6e2c41 SHA-1: 3f6ff57e9035d5a425d19fb412ab16ea2a29c408 SHA-256: 691ca971771297c7babfec5dcf6de8fa338d818d49bd54f2959f1e7e9bd7e2f7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses an MFA/2FA-themed lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/roblox-fly-hack-game-hack PDF link annotation
    • http://www.ideastreet.it/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.ideastreet.it/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/robux-link_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/robux-survey_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.ideastreet.it/images/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.ideastreet.it/images/easy-ways-to-get-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_003_off0000489d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489D 26188 bytes
SHA-256: eecfeb321c7028de773f8833264fb8aef2f875f46478dbb78a34aaa6e7eedd95
font_01_sfnt_off0000834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834C 18528 bytes
SHA-256: 48aa5298b09ebe1486756ea90f1095ff6b224374f32c9ff4b9ed1390be9ca915

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