Malicious PDF — malware analysis report

Static analysis result for SHA-256 6997555f5386ff22…

MALICIOUS

PDF

34.9 KB Created: 2021-06-30 02:48:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dcdf1f5d540c5b76767514b7260e5b9c SHA-1: 6d659eab162d719addd28a7d4971f1f23ac74056 SHA-256: 6997555f5386ff2291c2b3628917ec40372e93b215c17d4be9a0bdb7402469e0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. The document contains numerous links to redirectors and link farms, including http://netcdn.co/app/431946152/insane-how-to-get-free-robux-on-roblox-game-hack, which is identified as a malicious redirector. The presence of a visual download button further supports the malicious intent of directing users to external, potentially harmful content.

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/insane-how-to-get-free-robux-on-roblox-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-sharkbite-hack-script-pastebin-money_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-h-robux-aniversery-giveaway_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-speed-hack-download-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-cheat-in-roblox-find-the-doges_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-with-inspect-console_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_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_off00003373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3373 21768 bytes
SHA-256: a52d422522b90c652484b3d7d7096152bf0c8914b4a9fc79d8d3d081fdf2f0fe
font_01_sfnt_off00006370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 19056 bytes
SHA-256: 80a7f80016f376d1859d6d6551cc74c7fd18df1667776ca921be24399f5e2517

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