Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2f8d2a259e6799…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 00:02:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 964a109e894c5ecb45a5049e4c1355d9 SHA-1: c10126399956f228bf78f72c4f501a3b8633eb3d SHA-256: 2d2f8d2a259e6799b1cb4677800fd3adddfcd4366a7d36cb44f284c6dada9b64
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a critical finding of a malicious redirector disguised as a game hack generator. The document body and heuristics indicate a lure for free in-game currency (Robux, Zeni) and game hacks, aiming to redirect users to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-dragon-ball-z-final-stand-zeni-hack-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-on-laptop-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-for-android-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-use-tiktok-free_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-extreme-injector-god-mode_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-speed-hack-in-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-no-root_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_off000031f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F7 21976 bytes
SHA-256: a8759e5e9e86c2f8195f255773b522f0f89d34674ec24fcd5b548e4f7b181b55
font_01_sfnt_off000062bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 19480 bytes
SHA-256: ccdac741d182197c7b61ea35dd42e1e9208eb6e76d51ee813609ce530f987e1f

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