Malicious PDF — malware analysis report

Static analysis result for SHA-256 d916fc27699238db…

MALICIOUS

PDF

44.5 KB Created: 2021-06-02 07:40:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 08dc2cf23daa673cc80390ed2883188e SHA-1: f420b6db3970ad75e9449acf020a67e7f8b3963c SHA-256: d916fc27699238dbb0fc807fac854699874847d44ec28fd46383df55959bdc51
122 Risk Score

Malware Insights

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

The PDF document contains multiple lures related to game hacks and free items, directing users to external URLs. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may instruct users to copy and paste content into a shell, suggesting an attempt to execute commands. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.xyz/app/431946152/how-to-get-roblox-animations-for-free-game-hack PDF link annotation
    • https://ase-sinaloa.gob.mx/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/is-minecraft-java-free_GM479516143.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_off00004fdb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDB 24868 bytes
SHA-256: af6a413c5b1b9be13ad9564ac54cf52334b3f28cff698d7a73793e1f003a1df2
font_01_sfnt_off00008988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8988 18824 bytes
SHA-256: f9420ee98d994524bfdc665d1b48c70b624ff0f4ed1c1d78438af68fb4b50d59

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