Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8eea3f0b03534b…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 18:19:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 16e8213cde91b74aff2911cc6f98a916 SHA-1: 6a02b2a7d4dc40b60d21b79d343f68eecd99d216 SHA-256: cf8eea3f0b03534bd4f74d68ddb632c4dae8de2e3dc32d20609a602b138df487
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 0.9864

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.online/app/431946152/roblox-cheat-download-no-survey-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-pet-snacks_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_004_off00005453.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5453 25688 bytes
SHA-256: a865675714175385d5042877ac081658895d13dad7a8848dbc2475aee2c2232a
font_01_sfnt_off00008ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 19220 bytes
SHA-256: 60ba2319f8e5269bae0199d3dda53c818bf21a9df76382e9ed5c1c4b22f7328c

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