Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb5ab309599bb53…

MALICIOUS

PDF

46.0 KB Created: 2021-06-09 08:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bc70e54c7e903c20871ee1c5df9b6fc2 SHA-1: 2a5917ee8ef1a01eb7206e8681cd77184b96891d SHA-256: 8eb5ab309599bb53053c17e3b8b457c1736b5ac5721e079dc10c541c77c67806
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency or hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's structure and embedded URLs suggest a phishing or scam campaign aimed at users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-robux-no-spam-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-fire_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_off00004f6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6D 28124 bytes
SHA-256: 4164ecea6516a0608e7abf520d680a0a4d23f8f5cb74ee4632706963eec4d5d9
font_01_sfnt_off0000902b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902B 18680 bytes
SHA-256: 900e777faf381fc5e39e05f465811d969c030bfc3ec5dbfe044c586e8a9421b4

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