Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cd2b25d09528fa…

MALICIOUS

PDF

45.2 KB Created: 2021-06-07 18:13:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 37793ed2be55b9b96f62f2a48e9e58c4 SHA-1: 174df782d5cd35f6e237d582185b9b1718199172 SHA-256: 80cd2b25d09528fa9fd219e8ab6c3bf85977e121f3ce9302987aca4e525bb772
122 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 clipboard-command (paste-and-run) 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 0.9864

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.tw/app/431946152/how-to-hack-roblox-prison-life-on-android-ipad-2021-game-hack PDF link annotation
    • http://mountain.mn/uploads/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-tiktok-followers-for-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_004_off0000505d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505D 26384 bytes
SHA-256: 62ba9ce8e64576d87405dbd671faad3db5ff5cd57cfccb52317778047328d9ef
font_01_sfnt_off00008ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC1 19372 bytes
SHA-256: 05abe834f546cc53de03aa3ba17e5205ce07d111701f899a4d7a30a60c8b4555

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