Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b512d74eac99e2a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-19 14:51:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 921ce4cc28f99b57ba6b306ce3702679 SHA-1: 1e424b6b2e6e810f350270fed12de3cec773f661 SHA-256: 9b512d74eac99e2af55902a33b582a703b3d7764f660ea33a538eca5730ac945
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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/835599320/free-tiktok-likes-and-followers-game-hack PDF link annotation
    • http://ago.gov.pg/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://ago.gov.pg/images/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://ago.gov.pg/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://ago.gov.pg/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://ago.gov.pg/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://ago.gov.pg/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://ago.gov.pg/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ago.gov.pg/images/tiktok-follower-bot-free_GM835599320.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_off00003346.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3346 23216 bytes
SHA-256: 1ba5e81feb6e82b1d39eb1cfd53a0757b8c8341ad1b0de05f82a6640207fbcdb
font_01_sfnt_off000067e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 17868 bytes
SHA-256: d80a5b590fc1f536f9a9d288da246cac59e10184b672ed9828d0991e5480315e

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