Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36f8b6eed660e1c…

MALICIOUS

PDF

42.9 KB Created: 2021-05-15 13:07:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 819854299d35f50ab471d1e4046aacae SHA-1: 2d7e6d6cc4f9bf4d1744e03e100a581e5e1f282f SHA-256: e36f8b6eed660e1cc9aee72cc8d70623c8cd124127de67e2a4b22020a5f57e01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' to lure users. The heuristic firings indicate that these links are known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in free in-game items to deliver a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/como-hackear-coin-master-2021-espaol-game-hack In PDF document text
    • http://aviaprofsoyuz.info/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-not-a-scam_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
stream_003_off00004a39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A39 25420 bytes
SHA-256: f523d0a0075ecf624ecd75116f4beab16cadd716dcb17a7c8cddf7a470370011
font_01_sfnt_off00008477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8477 18628 bytes
SHA-256: 51d0c26a7700976d4b9729d2086435caf3cf2216ab56e6e35ff28649202ea5db

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