Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a08e5e6ca4d7e28…

MALICIOUS

PDF

32.3 KB Created: 2021-06-26 22:27:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1a4fce87f0bddc59289a348d55e713dd SHA-1: 8fe325751340e6b56bf4f2965ea91908248bc69c SHA-256: 1a08e5e6ca4d7e284b089270a034f65921ba4a192b19e02c41fe71893191d57c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors and websites, disguised as "game hacks" and "generators" for popular games like Roblox. The document body explicitly contains a call to action to access a "ROBUX GENERATOR" via a URL, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-hack-paintball-roblox-game-hack In PDF document text
    • http://kermas.eu/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-codes-2021-for-adopt-me_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-mad-paintball-2-speed-hack_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-10m-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-mac-cheats_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-digimon-aurity-cheat-engine_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-generator_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_off0000282d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282D 22028 bytes
SHA-256: 5d58611c104eb3504fe9457d63d7e33c0ffda30f3666575876513d63ac9f4bf8
font_01_sfnt_off000058eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EB 19200 bytes
SHA-256: 53957aca43202c0171f699110c51e1f25f1bc58243e39fd34d17f4c7bfb92385

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