Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f31d16f30d5ce6a…

MALICIOUS

PDF

43.4 KB Created: 2021-05-30 17:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4442c407994f416aeca0db82dc3265b9 SHA-1: 3c5e67ac6897f690032a0346c34cb4dd39826701 SHA-256: 7f31d16f30d5ce6ae64013e28a0cdfbcfc16cf941404e81c9872853908e539ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as generators for free TikTok views and game hacks. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, which likely lead to further malicious content or downloads. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9463

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/835599320/free-tiktok-views-game-hack In PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/buy-tiktok-followers-free_GM835599320.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_off00005070.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5070 24260 bytes
SHA-256: d6f049fb8a24f5572414effb89974229d9bf7db65b70cc4f82f2b522aab1c69e
font_01_sfnt_off000087e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E6 17752 bytes
SHA-256: fbbed6aa406878393a00abdc0937322fa009c5b8448fdc35bdb3145f27770f26