Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f2009f26deabd3…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 09:34:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8efc799a44a9cac7d72f0afef64be7e3 SHA-1: c34781312e9c1e9b6eb05a2d8210519aebd7f71f SHA-256: 17f2009f26deabd34c04b92afa82272e70fae70bcf987fc6705d89e5c3a8f197
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The primary URL identified is https://netcdn.online/app/431946152/best-way-to-get-free-robux-game-hack. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/best-way-to-get-free-robux-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-hack-link_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_004_off00005161.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5161 26956 bytes
SHA-256: 5c860b67407fc4ff2471ce5f6fa4689ba9b8a198ee8e0379ae9e46721de5de80
font_01_sfnt_off00008f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4F 18724 bytes
SHA-256: 0e67c697191027b8b448214b8413bf6f3ed0ff1165507b95d6a34aabcad7a82f

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