Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6068017832c97d…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 04:55:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 324cefca97e2f6b2d303f09d6b735c33 SHA-1: 87254597a17b6f189eafcb74c7e0407370c90db7 SHA-256: 8c6068017832c97d89f12942e6de715ac2a87bdf5d089d75d1a29e7976fa0d89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded URLs promote various game-related cheats and hacks, aiming to trick users into clicking through to potentially malicious sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-girl-hair-roblox-game-hack In PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-coins-2021_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_off0000537e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537E 24064 bytes
SHA-256: 118364c1874a22d21eda2c88f2c99d89ef5aefc595551d1685d6521a561338be
font_01_sfnt_off00008a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A83 18296 bytes
SHA-256: 8b4c4b2b466665ac93a944d4fc06515a87c4aea34a1519436c139db9e2468eb4

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