Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d3cc0de2e94821…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 19:47:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6a5300a1848d6bf635a284398a68e193 SHA-1: 1d3b001e9050b1f012c26121f5e7ed48018233b4 SHA-256: c7d3cc0de2e9482102cf7c9d34ef04d1cf8883a1b9ba9f4e089bbaae7f51c32d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text referencing 'Free Robux Hack Game' and similar lures, directly pointing to malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a fake generator or game hack, aiming to trick users into visiting malicious URLs.

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.co/app/431946152/free-robux-hack-game-in-roblox-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hexus-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-a-roblox-game-with-copylock_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-gift-card-pin_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-ninja-legends-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-promo-codes-roblox-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-vip-servers-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/pubg-uc-midasbuy-pakistan_GM1330123889.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/synapse-free-download-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-roblox-uno_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/rockefeller-street-roblox-game-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_off00003110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3110 21932 bytes
SHA-256: 7b29c230477ba8c26cbf91ae9d2ccda925fdec3a79ac2172d8a4608bfbc4c375
font_01_sfnt_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 19220 bytes
SHA-256: 40d7a4a34dd27b0fa1a50e6f18f299c4a1c63fcb168ce94f61100ca49b4f5bcd

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