Malicious PDF — malware analysis report

Static analysis result for SHA-256 d033c27a9864eea1…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 22:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 86e37273b9fbdad1573c54a403931d53 SHA-1: c8359442293ac57f2503cdd9a2c819422ac2f3fe SHA-256: d033c27a9864eea1176e46ee87e65cb12d61546d4a2f4a824733808a9d3d9e2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/431946152/www-rubux-game-hack'. This infrastructure is used to lure users with promises of game hacks, likely leading to further malicious downloads or phishing. The ML classifier also strongly indicated maliciousness.

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/431946152/www-rubux-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-lumber-tycoon-2-dll-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-auto-rob-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-sahrbite-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-studio-hacked_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hacker-arrested_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-sword-hack-reacher_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-cool-free-skins_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-bandit-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-how-to-use-osiris-cheats_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-v-bucks-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-obc-and-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-2021-on-pc_GM431946152.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
font_00_sfnt_off00002d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D06 22140 bytes
SHA-256: 3b05351b13eafeb9a1d96380cb5556e446a5fdf23604bf31d31d6147bf85e170
font_01_sfnt_off00005e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 18772 bytes
SHA-256: 35d640e4f5f6b0e7d29797825f5b03f909a069630f9706be3a19f635f6f41ed8