Malicious PDF — malware analysis report

Static analysis result for SHA-256 6514eeaf89f4d7e6…

MALICIOUS

PDF

48.3 KB Created: 2021-06-09 17:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9cd7ec9195c4421f68a3a1df5558ffe7 SHA-1: a17ec3327a16d59e8785723ecee3b3b1a322041f SHA-256: 6514eeaf89f4d7e638b1f83c0cb15b0c5a614e912a9836689218eb09a0bf5412
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.tw/app/431946152/who-did-i-get-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/who-did-i-get-free-robux-game-hack In PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/case-clicker-hack-pc-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/tiktok-free-textbooks_GM835599320.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hacked-jailbreak-roblox-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000527f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527F 25956 bytes
SHA-256: f94962c1ef20479c041290ac0010f5b2227609a4bf4a8430ce252bf3e30fbb5f
font_01_sfnt_off00008e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9E 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000983e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983E 18944 bytes
SHA-256: a9f1e4c7bb017f7db14f4db0707e9789f4cc98393756aac95543458e0fb1b7f6

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