Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e9691d58580205…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 03:43:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8dbf9c3157aa9721b0bd41728faae018 SHA-1: 0c1983b85aa3a2545a4b386065a1b6eba9166fce SHA-256: 93e9691d5858020518778a160f4d82d7c3ab38aa6f71b12f69bca3c4dab17eb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering free game currency and hacks, such as 'free-2021k-robux-no-password-game-hack'. These links are identified as malicious redirectors, indicating the document's purpose is to lead users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/free-2021k-robux-no-password-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-draw-it-cheat_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/como-usar-hack-dillusion-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hacks-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/best-roblox-hacks_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_off00002ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF0 21968 bytes
SHA-256: bec0f32732f0786c65e4b1693b44465b2ad13807077ba00a07a54cf5d57bf8cf
font_01_sfnt_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 19780 bytes
SHA-256: 4dbdc28b8b6f5308059f51ba5f3f42b4605115fda81433376b970cccedd2b279