Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ccabadae75909bb…

MALICIOUS

PDF

49.1 KB Created: 2021-05-16 10:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b377ee3e287b655b481b57696bdd2471 SHA-1: ba29686e6517f62b0bb9ea4161b6b1dd8b7ceff8 SHA-256: 1ccabadae75909bb2e88e6bcd06b28943a78000f8a8dc1b7b9343bcef98fbf82
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that promise free Robux and game hacks, acting as a lure for users. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a malicious workflow. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/free-robux-no-verification-at-all-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/earnrobux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-and-coins-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
stream_003_off000048e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E4 37960 bytes
SHA-256: 1b81a55626c606d36cef8a5d789f7d7ac4ad107eda13485544de87ede7098230
font_01_sfnt_off00009d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D04 18676 bytes
SHA-256: a2274236a7a2e18adabb7b86c58cf77696514c901240e043c32ff4f0260e6091

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