Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5041bde7fa25efc…

MALICIOUS

PDF

32.7 KB Created: 2021-07-07 10:12:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d6234cd1fa8e3efd50981bd64ffea65e SHA-1: 19f386467ffb626dfce7aa033fba311e9f7559be SHA-256: f5041bde7fa25efcaf7b4ba7d0bd91ce90b93ec7eb36a977b7f75c30d9237eb0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game hacks and redirects users to malicious infrastructure. The primary URL, http://netcdn.tw/app/431946152/descargar-free-robux-hack-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest a phishing or social engineering attack aimed at tricking users into downloading further malware or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/descargar-free-robux-hack-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/aos-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/lyce-de-roblox-2-hack-director_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/pokemon-go-free-kanto-tour_GM1094591345.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-roblox-robux-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B13 22104 bytes
SHA-256: 1712ea3f80ab90fc98cdac171ffe94af35d1074c8417de1bf924be1481fdc27c
font_01_sfnt_off00005bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB8 18868 bytes
SHA-256: 64f065d916130bc7fa502c37321e420da3a74097138e1eb67d762bae1f529b0a

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