Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc15beb79a3d864b…

MALICIOUS

PDF

44.2 KB Created: 2021-05-11 04:53:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6176aba07ad06b64669ad423dbcda5ea SHA-1: debb55dbb039887a06dead762123bfb3d9ba190e SHA-256: fc15beb79a3d864b09a8b15d05fcd66ce7514234caa1f721430904f259b4a78a
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 0.9976

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.xyz/app/406889139/coin-master-free-spins-android-game-hack PDF link annotation
    • http://www.lovecraftiana.com.ar/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.lovecraftiana.com.ar/images/roblox-skins-boy-free_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_off00004af7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF7 30424 bytes
SHA-256: ce2170266bcace3730d866fdee4fec2ae8e0b8aa9a12a4f7e5793a2a50076b55
font_01_sfnt_off00008b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1D 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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