Malicious PDF — malware analysis report

Static analysis result for SHA-256 c102b895925496a5…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 18:14:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ecf780211eac3bebbd9fae5c705e14c7 SHA-1: 834f0114fe253ebe40b56eba342b17fb9a3273a5 SHA-256: c102b895925496a5c9bde9e994ed6ca6141573ff1e39083f724daeec5d2ccf79
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based 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 0.9971

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/free-robux-android-game-hack PDF link annotation
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-hack_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/are-robux-generators-safe_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
stream_003_off00004630.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4630 26100 bytes
SHA-256: 88cd292a908dece227b1056135809fe2c3596abd05bcaf66e062c0c8f9c91187
font_01_sfnt_off0000825d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825D 18308 bytes
SHA-256: 3d682ae06d788585f0d48ef4471ddbfed33e391fd6a867cb0ce2fb595824b3ec

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