Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2f9668c39969d1…

MALICIOUS

PDF

37.3 KB Created: 2021-06-27 19:06:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 405fae3ebb1b50802f2ec51813a78c34 SHA-1: d442b0c3459923beca841fff6a0381cd6a421e7a SHA-256: 9e2f9668c39969d10e6b3c726ff7b93db1810d4f474f7beb6ea481bb132fe61d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, attempting to trick users into visiting a URL that leads to a malicious redirector. The primary lure is a 'free Robux generator', a common theme in scams. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded links are the primary vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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-robux-generator-no-scams-game-hack In PDF document text
    • https://itv-grabungen.de/images/roblox-builders-club-free-2021_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-eu5_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-things-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-roblox-games-that-i-can-play_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-free-codes_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-roblox-2021-working_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-into-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-girlfriend-cheating-video_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-a-roblox-account-2021-synapse_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-things-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/does-free-r-here-in-roblox-actually-work_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_off00003b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B00 22488 bytes
SHA-256: 34226b81d40c5e852ac10198bf2d706df977870288953806629ee991365f24a0
font_01_sfnt_off00006cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF7 19080 bytes
SHA-256: e206a966e556e85b0e98d25af3f2fc72812712c8e45a83a8f0ba32d9989b64ee

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