Malicious PDF — malware analysis report

Static analysis result for SHA-256 948151f30739c52a…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 08:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 54d180e26afb69978b5f8c2369d4ef1a SHA-1: 943c8ddedb86d19b3a1da1ce918076ce7368f246 SHA-256: 948151f30739c52aa567aeca9cfe9c891355c0552a47d2ec55d462c3496286a4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and content related to game hacks and generators, indicating a lure for users to visit potentially harmful websites. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded links and the nature of the lures suggest an attempt to redirect users to malicious content, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/how-to-get-free-minecraft-skins-game-hack In PDF document text
    • https://itbits.ie/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://itbits.ie/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://itbits.ie/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://itbits.ie/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://itbits.ie/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://itbits.ie/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://itbits.ie/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://itbits.ie/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://itbits.ie/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://itbits.ie/images/coin-master-daily-free-spins_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
font_00_sfnt_off00002ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCD 22172 bytes
SHA-256: e74e545b006db27c653487b928449ee568cb52b44c8d0a2b18cb343b4607b7e7
font_01_sfnt_off00005d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 18044 bytes
SHA-256: 2e9033515f3ff21116dec08c3b5b633a0403805954c28c410ec38fa0176f1df4