Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19bc2205978d039…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 05:55:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 23fbf39223292dc2cb39b8e3681f460b SHA-1: bdf848bb710098e9e9f55219aa6392d08d9525fa SHA-256: c19bc2205978d039318fafa2b0de0bee67a577a4c04cf21523b930fe0d9527ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for free game items. The primary redirector URL is https://netcdn.online/app/431946152/free-roblox-templates-game-hack, which is presented as a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, aiming to trick users into navigating to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-roblox-templates-game-hack In PDF document text
    • http://www.hlad.hr/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/tiktok-bots-free_GM835599320.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/without-tiktok-free-view-iphone-11_GM835599320.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://collectrobuxIn 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_off00004d78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D78 25368 bytes
SHA-256: dc7063181bccebd8918d7f4dbf41eaad6bb9fea7430a16277c8f7ac90c153a8b
font_01_sfnt_off00008851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 18716 bytes
SHA-256: bf2cc55c1544d3a32bf4b8d9dd067a1dc9fa2bd8ba88e470198e88e73129adbc

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