Malicious PDF — malware analysis report

Static analysis result for SHA-256 497d6560714f25de…

MALICIOUS

PDF

46.1 KB Created: 2021-06-11 00:43:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 03e442458cc06c604e8e6dec34ee420f SHA-1: de3d5e82db05fb2f6c8e19ca71d98c8a1d929d0d SHA-256: 497d6560714f25de1715c13340d0df4908edb7a33dc670572ea91a0c3c4ea741
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game items and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which likely serves as a gateway to further malicious content or downloads. The ML classifier also strongly indicated maliciousness, supporting the heuristic findings.

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/cool-free-items-in-roblox-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-instantly-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pubg-uc-kodu-yazma_GM1330123889.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-legit-no-virus-click-here_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-trade-evolve_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-com_GM479516143.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_004_off0000537b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537B 26656 bytes
SHA-256: cfbb900123bee84a9878cc50145c5463a960fe01140b92a388f4ac389870ec6f
font_01_sfnt_off000091c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C6 18312 bytes
SHA-256: 4153370cafab85bb06e2f80cb4562046a0a02a52090fe2f3cd9db11003a27237

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