Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9386aa185fff1f…

MALICIOUS

PDF

48.9 KB Created: 2021-06-07 03:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5e027b33b4a21e942ed7c3d0bad64514 SHA-1: 3cdb381ea0a0ce20507ebc48cf8ad375f16309d4 SHA-256: ab9386aa185fff1f5e0fff83c9630394a05290ce94b64a6f01b0f0d0baec7fd8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9796

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.tw/app/431946152/free-robux-legit-2021-game-hack PDF link annotation
    • https://learnwmf.org/image/data/files/pubg-uc-official-center_GM1330123889.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/rewards-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000522c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522C 27416 bytes
SHA-256: 5f34fa1eb874f60e4b4d80f8bfce2ae506edf9a2c4b303cadac1593174f6923c
font_01_sfnt_off00009086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9086 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A36 18928 bytes
SHA-256: 4fcc659f6218715f516ca63f911a9aa4b2bc62ab7ad3ebfb6481473152e27863

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