Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee54cf549dafd66…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 04:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 24cb524bb7f535f3a0fe5d6208717357 SHA-1: 885a4ea2dc0d3395e6cd2fe3752e22089367c57d SHA-256: 5ee54cf549dafd6664d4753ac3099bebfa81feab71e694cf83cca451bc219a25
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators for popular games like Roblox and Coin Master. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-com-hack-game-hack. This indicates a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a social engineering attack.

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/roblox-com-hack-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-someones-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-cbro-free-money-hack_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/cheat-speed-city-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-rocitizens-free-money-glitch_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-hell-on-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.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_off000032af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AF 22200 bytes
SHA-256: 1ff15147e533bf506ad5b5617b66e09fd14b1403f78629a0dedb6da7cceb0974
font_01_sfnt_off000063e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 18916 bytes
SHA-256: 9cb05533f98f4e2367072af5f88feb3ab929c06b5a26e3a671612f35ad90b071

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