Malicious PDF — malware analysis report

Static analysis result for SHA-256 932f5d58973b8914…

MALICIOUS

PDF

33.7 KB Created: 2021-06-27 22:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ac183671e9d767a3eb2ccbd93718ed4a SHA-1: 704dd1f34778d08d53b5a4cdc7c8e878a55678e3 SHA-256: 932f5d58973b8914fa9360e8f466441bd066fe7d503c153fd7e6e8f5b67b4632
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, promising free in-game currency or hacks for popular games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to drive traffic to these malicious sites. No scripts were extracted, but the presence of numerous malicious links indicates a high likelihood of user redirection to potentially harmful content.

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.co/app/431946152/hack-accounts-roblox-no-offers-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-stuff-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-cheat-engine-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/download-free-robux-app_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-idle-animation-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/face-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-card-codes-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-make-clothes-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-no-verification-2021_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_off00002eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF 21828 bytes
SHA-256: eeef3ca0e7936e110011c326b6d9e0331a2a675b1400475582f825018cf73e65
font_01_sfnt_off00005ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC1 18900 bytes
SHA-256: 2cce8ab79b0ab79f2a892490dd5da3c382f97283e6e44bf35c420e5d832fdebe

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