Malicious PDF — malware analysis report

Static analysis result for SHA-256 44821305bf23422e…

MALICIOUS

PDF

47.9 KB Created: 2021-06-11 01:11:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 064fc5037a54d960950ff54abaa26aab SHA-1: 0d7fb661cc40ac0bd696d2a06f28819052e4ab67 SHA-256: 44821305bf23422efcd44a4d558cb02745f130d9954be2d5ab368cee3ca02d5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free generators. The primary redirector URL is https://netcdn.tw/app/431946152/prison-break-roblox-cheats-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirection workflow designed to lure users to potentially harmful sites.

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/prison-break-roblox-cheats-game-hack In PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/tiktok-free-likercom_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-robux-card-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-spin-link-free-download_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
stream_004_off00005271.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5271 25444 bytes
SHA-256: b44922d18a6955376c13ff5b3a1a692c0a3804b7297b00157efb0303b5572cdb
font_01_sfnt_off00008dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBD 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000976e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976E 18728 bytes
SHA-256: 0bc9138774e6367ba855698fbf9151c9ffa189dbd6be74239a856af2c0f01539

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