Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3db5d4f9ee5cf9b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 23:54:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4c08b7de443e0fe7dd01b941245e32cc SHA-1: 6e4435d3e021b7bf482854ac396a5c0043f3753f SHA-256: c3db5d4f9ee5cf9bb4f9fd8f48600543bada5adf7a3043bb5f8c977f9e5f6700
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game currency, specifically referencing 'Robux' and 'game hacks'. It contains multiple embedded URLs, including a primary malicious redirector at http://netcdn.co/app/431946152/how-to-get-free-robux-2021-on-ipad-game-hack. The document's structure and embedded links strongly suggest it is designed to trick users into visiting malicious websites, likely for credential harvesting or further malware delivery.

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/how-to-get-free-robux-2021-on-ipad-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-online-sign-in_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/2021-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hacked-roblox-3d-shirt-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-dat-boi-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-how-to-look-like-a-hacker_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-roblox-games-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/rbxcity-free-robux-instant-pay_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/black-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/counter-blox-roblox-offensive-hacks-download-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-robux-net_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheats-pet-simulator-roblox_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_off00002dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFF 21692 bytes
SHA-256: 6fae1e458842448eb528067b6a826e6bf43c4934f92eb82317aaa2e6309b1051
font_01_sfnt_off00005da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA8 19736 bytes
SHA-256: 76e101539ef7ef98e83b53697a81b45bb2c4f385e1fb6e5a0025a9cde92a62e7