Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bba6e3744c059c3…

MALICIOUS

PDF

34.2 KB Created: 2021-06-25 22:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1654c8443bc384815b17498ac7b3883a SHA-1: e1c7c28364b7bbede0e6f527d0748fff3819a8c8 SHA-256: 4bba6e3744c059c31a29ad18c6dd3d0dddde66f70260d785aa057a062f349123
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that are identified as malicious redirectors, specifically targeting users with lures related to game hacks and generators for popular games like Roblox and Coin Master. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-game-development-kids-free-game-hack, which is part of a known malicious redirector infrastructure. No scripts were extracted from this sample, but the presence of malicious links strongly suggests an attempt to redirect users to potentially harmful 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/roblox-game-development-kids-free-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/script-roblox-hack-exploits_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/do-you-want-free-robux-get-unlimited_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-adopt-me-bucks-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/fiverr-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/pubg-uc-giveaway_GM1330123889.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-cheat-commands_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/rbxcity-free-robux_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_off00002d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9F 22164 bytes
SHA-256: 66e2d66f58ae3c9571dd946e5d7fb329f2f711b01a327ad51388a8351d679a10
font_01_sfnt_off00005e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7F 19764 bytes
SHA-256: a2dc1c6a7add01b6b22f8c87964bd12ccdc7d6ed04fb12c38dc7e1e09f244f25

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