Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e1af4c99c1f4c9…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 15:46:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dae706f689da41f594fd77e9499c6636 SHA-1: 4e7b08dd3c1272e54e724e110203bae4645805a6 SHA-256: 39e1af4c99c1f4c96ca96796c3edbb3adeba6df8fd97d98acda2eb19680a62c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/haktuts-coin-master-spins-game-hack, which is designed to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering attack aimed at driving traffic to malicious content.

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.tw/app/406889139/haktuts-coin-master-spins-game-hack In PDF document text
    • http://www.siahotel.com/userfiles/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-hack-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/spend-free-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/cheat-engine-wallhack-roblox_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/roblox-pet-simulator-hacks_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/coin-master-hacks-no-surveys_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
font_00_sfnt_off00002fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB1 22224 bytes
SHA-256: d1581313d94555bbe6da494b7938fb3e03aa1c36bafdffe108e366f0d02ab316
font_01_sfnt_off00006113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6113 18320 bytes
SHA-256: 4d6b5a7e8d71a8cfca2907d7514c709552786c5f23281e6f9e82b92694f55921

Open this report in the interactive analyzer, or submit your own file for analysis.