Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a341b2009d74893…

MALICIOUS

PDF

44.9 KB Created: 2021-05-19 20:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9cc49262ad3dcf0250b1c41565ab9460 SHA-1: 9d3b1c77370c5525753f9ae3f33ccef2b41a2087 SHA-256: 0a341b2009d7489304adb2c99851c7f7226a36865e86ba65025dd9682f46f8ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/50-free-spins-coin-master-links-game-hack In PDF document text
    • http://sbm-nn.ru/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3C 24828 bytes
SHA-256: f4fd36ef91b548f9317d508ecda4ad9d0195a959cf58c125d1c23e0a36e3b4a5
font_01_sfnt_off000082d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D8 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C89 18364 bytes
SHA-256: 5f18526dee368ac18b20cf023ba1ff49340788242d54a3837ea53eed50d07245