Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffb9e442a983b16…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 05:16:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e3ecad1eb29fcb18fa28c78e79c5ed74 SHA-1: bf5646b9381186bcf2c3b2cddee6edf9060b53b8 SHA-256: 0ffb9e442a983b16f1476b519745ca40e0d18714bbd02c67972c93a48180405a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL that hosts further malicious PDFs, masquerading as game hacks and cheats. The document body and heuristics indicate a lure for free game currency, directing users to download potentially harmful files. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/coin-master-get-free-cards-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/wurst-115_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verification-2021-android_GM431946152.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_off0000517c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517C 25264 bytes
SHA-256: 80cb1269b9e60f7406d45bf475c15381f7516a2df20f8b98bad9bb296b9041e0
font_01_sfnt_off00008965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8965 17884 bytes
SHA-256: 5b281f9ab4f938cb23f4159929956e1cae7172efdead6ba15b04f3aeaf5d2e05

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