Malicious PDF — malware analysis report

Static analysis result for SHA-256 1607b1e152a07f60…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 14:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 68eee5c0344f304dcd52e7bcb8592adf SHA-1: 6aa8dbb155c10ab4f608ab8946647d9fe27924b6 SHA-256: 1607b1e152a07f6072ff1be55f210578af5860919f3685c772d7b9ad9411d7e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, masquerading as a generator for game hacks and free currency. The primary lure is 'Coin Master Free Daily Spins', directing users to 'http://netcdn.tw/app/406889139/coin-master-free-daily-spins-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/coin-master-free-daily-spins-game-hack In PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-robux-windows-7_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-how-to-cheat-on-tycoon-games_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/quiero-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-noclip-free_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/earn-5-robux-free_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/robux-free-android_GM431946152.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3174 23392 bytes
SHA-256: 4b7df9d642be086a7aab86f361dd363be6d775cfc51e97fa530405ac7acee08c
font_01_sfnt_off0000666d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666D 18596 bytes
SHA-256: 9cc88ea50ead10f9f912dbf4be3878b8b313467d4147098bf597ecbc2abb3a30

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