Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1af8abb7a4e718…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 10:19:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4c099472e4eaadb0f4a2a06f7df6d647 SHA-1: 98a848013d3be2dea7ded900daf0e9ca59ccdaf5 SHA-256: 2b1af8abb7a4e7188895704f06930d88f3a5ca4f20ea8bfa4e1cbc585fb56ddf
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, directing users to the malicious domain http://netcdn.tw/app/406889139/freecoins-game-hack. This indicates a social engineering attack designed to trick users into downloading potentially malicious content.

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/406889139/freecoins-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/are-games-on-roblox-free-to-make_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-shinobi-life-free-spins-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-robux-gratis-pastebin_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-on-mobile-ios_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-accounts-with-robux-december-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-weight-lifting-simulator-2-strength-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-get-new-outfit-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-whatever-floats-your-boat-level-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-get-free-skin-in-cs-go-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-cheat-no-key-required_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/apk-stezo-roblox-mod-apk-free-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-server-in-roblox-script_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DD 22648 bytes
SHA-256: 6969256b1395b2e27e6bfbebad3fac5454840a53f290da368d7216989f3a506a
font_01_sfnt_off0000637f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 17896 bytes
SHA-256: 95b27e0fe0f8d09f21308dfe7f1e0da3cbc5e6d7e802a0f52430e90404511a42

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