Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7341df561c9c51…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 09:47:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 60776574b0f1b564b113bc602f551e87 SHA-1: dde69841b5fbbc0318918844267e0da19fea1c20 SHA-256: 8d7341df561c9c51995efdb60e5768e9ff3296ac867861d11a3108a0168299af
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites that offer 'game hacks' and 'free currency' for popular games like Coin Master and Roblox. The presence of a link farm heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. While no scripts were directly extracted, the document's structure and embedded URLs strongly suggest it functions as a lure to drive-by downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-hack-spin-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/jai-eu-2021000-free-robux-no-fake-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-a-rank-on-roblox-groups_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-codes-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hacker-roblox-video_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-para-atravesar-paredes-en-roblox-2021-en-cualquier-juego_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-202120210-woking-feb-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-legit-not-patched_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-free-money-hack_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-linkmon99_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
font_00_sfnt_off00003135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3135 22992 bytes
SHA-256: 95e291a16a3046d0e4fe2ec275ff9422eff2f88bd0b7a74f8604e05048252dcc
font_01_sfnt_off000064f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 18180 bytes
SHA-256: 8089ec70024e38c963cd1b8e4fd66f251d2ac35f3e2526171ef4435f22e5a9e0

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