Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6cf40449db4019…

MALICIOUS

PDF

48.4 KB Created: 2021-05-12 04:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f41ebb16db5a96a9a97421dbd7a9434c SHA-1: bd151d3370967af2b9e9d98908d787da6e4451ba SHA-256: cb6cf40449db4019b77aaf8726d8df5770801554de098605f132c6ca6e02fd0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically targeting users with lures for game hacks and free currency. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted from this sample, but the presence of multiple malicious links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/how-do-you-get-free-robux-on-roblox-game-hack In PDF document text
    • http://www.perpusffup.or.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4C 26560 bytes
SHA-256: a10edca077da6537d52172e9ace2def3faae17b968ae4f31a0b6ca920531f9d7
font_01_sfnt_off00008894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8894 6932 bytes
SHA-256: db09f4a788b7ced0373f10146061edf2b3b7da46f7984df6e2e60c0115dc9677
font_02_sfnt_off00009969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9969 18688 bytes
SHA-256: 1a1edbb4620230d43f84097700922ea11c75fa5ad69815b80eb1b16329c7dce0