Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9006e8f570706e…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 06:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 45432f0a84e5e976cd306b413ccda65d SHA-1: 302b6cd0fb14e738649ff321ee9bfdf2a86c4d01 SHA-256: fe9006e8f570706ee6d9fa9a8ab28578ccf7eb6f92c92676a56b9dee391d719f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery 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 0.9796

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/coin-master-game-hack PDF link annotation
    • http://autoskola-scp.com/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-tiktok-views_GM835599320.pdfIn PDF document text
    • http://autoskola-scp.com/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005191.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5191 27036 bytes
SHA-256: 945d10a2e81f481106a9acac448c5a926b68594fe11e7236eb8f0a4445a6f704
font_01_sfnt_off00008fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD4 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00009ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB3 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d

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