Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18f9df2a87cc245…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 06:49:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d701a2589e739a8c2ff30f59d86e3b62 SHA-1: 17d76f7f3e93e635616e9b74c88c555e6235018c SHA-256: c18f9df2a87cc245b8ace6823f9a024280e638ea0b30534ab3846c8bc3d69719
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a game hack generator, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were extracted, the presence of multiple suspicious URLs and the ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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/daily-free-coin-and-spin-link-for-coin-master-game-hack PDF link annotation
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.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_off00004c69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C69 24924 bytes
SHA-256: 8cc1286ceffb633bab5d566e836f36ea48fc40e4788e373da9a9a225c032704b
font_01_sfnt_off000085cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 18652 bytes
SHA-256: 3777b5d13c6883454b23159e5c41cd83249453163b29f9aac7ae2dedc324f7ee

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