Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf7cd1b80be042f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 06:25:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8b936728f77bacb2347e72c9fe23fda0 SHA-1: f8802c4d0fb9298c7d73efc8907ecd3230eabbfc SHA-256: cdf7cd1b80be042fcbc21bbce7a0f5ca166b577d4290a61405a21c00d719a415
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators' for popular games like Roblox. The primary lure directs users to 'http://netcdn.tw/app/431946152/what-do-points-do-in-roblox-game-hack', which is flagged as malicious. The presence of these links and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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.tw/app/431946152/what-do-points-do-in-roblox-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacking-system_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/See-plans-and-prices-httpswwwsemrushcomprices_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-robux-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheat-engine-for-mac-os-x_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/pagina-para-hack-en-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-2021-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/adds-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-cards_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-one-punch-man-cheat-engin_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pet-simulator-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/the-game-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-skywars-coin-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/bc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-rape-hack_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_off00002ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF1 22132 bytes
SHA-256: 158845d06e77d8d0aefeb1894b5805ba3061d2d9b070e59d1740552406636770
font_01_sfnt_off0000600e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600E 19396 bytes
SHA-256: a62d5346b0f2835f2e75e1eb1b6dd5b50eccd81c08c9e1227801707628a7190c

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