Malicious PDF — malware analysis report

Static analysis result for SHA-256 7753241999924bf1…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 20:56:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 15aa0667661291dde3a76a1c29f9aa5c SHA-1: 0828d51d6377306172002d35b8cd7cf85b531adc SHA-256: 7753241999924bf12ea721c034fc5fac401edf00e87299756fd9f33d0aea4f76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/free-download-roblox-intros-game-hack. This redirector is likely used to funnel users to malicious sites or download further malware. The document body and embedded URLs suggest a lure related to game hacks and free in-game currency, a common social engineering tactic.

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.co/app/431946152/free-download-roblox-intros-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-headphones-code_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-admin-on-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-for-playstation-4_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-dop-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-get-free-robux-from-creating-a-game_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-http-robux-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/install-roblox-free-for-pc_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-hair-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/supreme-t-shirt-roblox-hoodi-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/best-free-games-to-play-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-hack-on-phone-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-shirt-bot_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-rixty-robux-codes_GM431946152.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_off000032ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AE 22564 bytes
SHA-256: 0438c66bd2ae6d968c376537b87d2ee508e3204673c77be5ef53ab19a5218be9
font_01_sfnt_off000064f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 19260 bytes
SHA-256: c3ee55d7e0761c78050ed59709647822da14cedfd3b354d6e9bb4f45539a4c13

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