Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d2341b338b57d7…

MALICIOUS

PDF

35.5 KB Created: 2021-06-28 18:37:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eaeca18ffd285fa0700895f64162d3b2 SHA-1: 0c48b3332e39019599b0f241682c490e330c79da SHA-256: 66d2341b338b57d760635e26e161d695285cf4a3f20a490c69697b508a0125c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/get-robux-free-fast-no-verification-or-survey-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely intended to lead the user to a site that may download further malware or steal credentials.

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/get-robux-free-fast-no-verification-or-survey-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/inject-hack-roblox-in-game-code_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-download-vermillion-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/copy-paste-bin-1million-free-robux-script_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-adopt-and-raise-a-cute-kid-free-admin_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/can-you-get-robux-for-free-froom-roblox-hames_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-robux-hack-jailbreak-ios_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-2021-feb-eazy_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/is-roblox-on-ps4-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-shenanigans-mod-cheat-codes_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_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_off000032e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E2 22444 bytes
SHA-256: d9168c7cb93209c5987d120e3289adb2450556a19777f5389024e392ada7cbb5
font_01_sfnt_off000064d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 19368 bytes
SHA-256: 74463aba862892dd8f7fa1664888909579e795e440efd06153310650eaba0438