Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcd1d3ad690e9ef…

MALICIOUS

PDF

36.7 KB Created: 2021-07-08 17:49:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8eb5db6b4d50cb90e6247944278d6fbd SHA-1: 08286700326a06455dc2a37f059203e12387e80a SHA-256: 9dcd1d3ad690e9efe97a8f2b718cd2bb37c29280eb66f563433220d3c1c9d4ce
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/406889139/coin-master-free-spins-2021-hack-game-hack PDF link annotation
    • http://olimpik.mk/imagescke/upload/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/robux-hack-working-2021-inspect_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-free-robux-on-mac-2021_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/robux-hack-no-survey-no-download-easy_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-trial_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/hack-injector-for-roblox_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-a-shoulder-pet-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-minecraft-windows-10-edition-for-free_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_off000037e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E4 23076 bytes
SHA-256: ab6e6f59658c9803ebcb227fb2c569a428ad2c4909d972579500e5edef67ab9f
font_01_sfnt_off00006ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 18748 bytes
SHA-256: 92aaead82d55c20f13300fdcc9721abaffa6ca8ca490d535bbad7112df5e0c31

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