Malicious PDF — malware analysis report

Static analysis result for SHA-256 344acfe4ca0ba057…

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 22:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5d94817acde2f9771cfc016b295e10c8 SHA-1: d99b462e8b352ca76e5816bf4eba09f0673d97cb SHA-256: 344acfe4ca0ba057a10658625950026fd019688e49c0209118e7345879a66b89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, disguised as a lure for free in-game currency. The primary redirector URL is https://netcdn.tw/app/431946152/how-to-get-free-500-robux-game-hack. The document's structure and embedded links strongly suggest it is designed to trick users into visiting malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF's nature points to user-interaction-based exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-500-robux-game-hack In PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-create-a-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-no-survey_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
stream_004_off000052f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F4 26880 bytes
SHA-256: 29c37e3da27949c76d509de2f28358d73f88b55a083f67ceaaffe60301f7361d
font_01_sfnt_off00008ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE8 18588 bytes
SHA-256: d0ddf17ddcf062588f7a58be44be157a327c32d340725f7389b7480b641f39a3

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