Malicious PDF — malware analysis report

Static analysis result for SHA-256 0189e97c4e777b81…

MALICIOUS

PDF

34.3 KB Created: 2021-07-07 01:58:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 89fd5faaf6c6efd0abede7d1ba0b0764 SHA-1: 14fdf21fcbf77317bd6d31a757f04683b42b09b3 SHA-256: 0189e97c4e777b81f4d9e59c25231173e12a03b2ff20db30db08272aa7589c6c
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 0.9980

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 http://netcdn.tw/app/479516143/minecraft-classic-free-game-hack PDF link annotation
    • http://www.nfca.org.tw/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/scriptexecutor-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/is-there-a-way-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/2021-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-infinite-jump-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-hack-roblox-to-get-builders-club_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/fnaf-roblox-songs-cheats_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-how-to-hack-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-minecraft-for-free-on-phone_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_002_off00003203.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3203 22880 bytes
SHA-256: 1dcddebc0472e105d79cebc90ddf3770469a8f97b216128b817e0118717926ce
font_01_sfnt_off00006480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 17928 bytes
SHA-256: f5ae882fe2605c2402409cd3cb641bc0b4456540121854b01f6cb44cdc09e6e6

Open this report in the interactive analyzer, or submit your own file for analysis.