Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3024f87e22778f…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 08:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2b87d63b2c79bf077f988d21d5092fa5 SHA-1: d78a1dc8fde822712de799e8005e2033fc952d4c SHA-256: be3024f87e22778fe586da05cf601ac9acdedbfc23aca3ce03786276f4d22ca4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-from-coin-master-game-hack In PDF document text
    • http://mountain.mn/uploads/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-coin-master-cards_GM406889139.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_004_off000050e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E0 26148 bytes
SHA-256: d7e7675686798c540a5f8f3443d8acadfcfc330c8fbcae40648f2db1557d485f
font_01_sfnt_off00008c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C61 18148 bytes
SHA-256: a8179ab01d9f651dd6fb5ce3364ead5561884d8b40fe8a62eaf26fde05d0c646