Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cee0d68fdd2f9d2…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 19:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c33ce64edf3ff28e38ace1de9e7c4e03 SHA-1: f4a5badb4fc3f052af7bdea6519ba1cc4f4a0977 SHA-256: 7cee0d68fdd2f9d241a35a14cfa7e98c4e7250e1760d28f421bc1610a5a3dc24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as generators for free in-game currency like Robux. The primary lure is the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-inspect-game-hack, which is associated with malicious redirection infrastructure. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the PDF's structure and embedded links strongly indicate a malicious intent to redirect users 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.tw/app/431946152/how-to-get-free-robux-inspect-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/knife-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-para-tener-dinero-infinito-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-dominus-november-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/optifine-pe_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/noob-vs-pro-vs-hacker-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.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_off000032ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AC 22016 bytes
SHA-256: c5f35769b1f538cc63c853867eb04a7c9e54c9eafd1e9b1f176aa72444408faa
font_01_sfnt_off00006349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 19160 bytes
SHA-256: a79e904f98942f0f1997061c783f6f470572e5bb469a52c8c6f0e1a5d6c47e09

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