Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c043f3af6549750…

MALICIOUS

PDF

37.2 KB Created: 2021-07-08 21:48:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 45cf4f2574cd4967a36fa28e434d08cc SHA-1: 5d8c632c4f2db47e77d257fadcbc8216fbc62d77 SHA-256: 3c043f3af65497506cd3b900a4c03074bbcda4cb1784c08a964bdd7f4b2f2bf1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to external sites, including a known malicious redirector. The document body and extracted URLs suggest a scam related to game cheats and free currency, likely intended to lead users to phishing or malware download pages. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/huskybuckscom-free-robux-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-play-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-cheats-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-codes-for-tower-battle-simulater-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-lua-executor_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-jailbreak-hack-download-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-roblox-on-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/echter-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-script-executor-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/youtube-how-to-get-free-robux-without-human-verifaction_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_off00003a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A15 22436 bytes
SHA-256: facff09d93194a6898363581ac8a4d54057c4a7ab6c9271cef9fb9654187fa3f
font_01_sfnt_off00006bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCE 19324 bytes
SHA-256: fa71a02eff7d38361fd0194e941a22015f12e2817721f9ddba48d3de862e217b

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