Malicious PDF — malware analysis report

Static analysis result for SHA-256 14de71fc976533fc…

MALICIOUS

PDF

43.0 KB Created: 2021-05-15 10:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fcfe0b69d263b8368b10745049d8af07 SHA-1: 0c9906c0ca773a24e6e9c428dce25225e8191040 SHA-256: 14de71fc976533fcb1736e258e1321ee3037048b445a1bacaaff4ba46ecc9bb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase designed to lure users into clicking on malicious URLs. The primary URL, https://netcdn.xyz/app/431946152/free-robux-offers-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a scam related to in-game currency ('Robux') and game hacks, a common social engineering tactic. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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.xyz/app/431946152/free-robux-offers-game-hack In PDF document text
    • http://ag-metal.fr/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/how-to-robux_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ag-metal.fr/images/robux-only_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45E1 23876 bytes
SHA-256: 581c6ba958ef8ec878b84f1c091a62cef8c76c0bbfe19157be3d399a5f828839
font_01_sfnt_off00007c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000085f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 18012 bytes
SHA-256: 2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6

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