Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2865ae7efa15433…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 13:54:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9915cfe888d4083cec13b54904aafca2 SHA-1: ebf4d4b6fff7948723cfa42e57f15d976e4e0a97 SHA-256: e2865ae7efa15433761935f8473cf8a025bacd098e3cb3fe6abc8b5adc4efff9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The primary redirector URL is http://netcdn.tw/app/406889139/how-to-hack-coin-master-without-root-game-hack, which likely leads to further malicious content or phishing attempts. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded URLs point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-hack-coin-master-without-root-game-hack In PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/inmpact-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/elite-roblox-hackers_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-clothes-site_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/piano-keyboard-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-clothes-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-do-u-get-robuxs-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-accounts-dashing-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-games-for-free-online-no-download-no-account_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-2021-john-doe_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-bc-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/unused-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-spin-and-coin_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_002_off00002ec8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC8 23416 bytes
SHA-256: ded6661f38c4201b4816204b0cdef29660cd8c08f9c5f7cd62f083ba1e9032bf
font_01_sfnt_off00006372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 18672 bytes
SHA-256: 65f2c136a711b33bae163ea9f406f42914fe63f4814e0759507e5b4be6ac5284

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