Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ad16e9d06f74af…

MALICIOUS

PDF

33.9 KB Created: 2021-06-19 01:48:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 11591de450b20345c63ce93634cdc39e SHA-1: 306053381df97e9960744c10a5787576017e7636 SHA-256: 83ad16e9d06f74af7ea5fc2d4b15cd486b2dba0ccf7f4dbc1b6d9a9a0f0cf82b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one identified as a malicious redirector. The document body explicitly mentions 'Nice Roblox Games To Hack' and includes a URL pointing to 'nice-roblox-games-to-hack-game-hack', indicating a lure for potentially harmful content. The presence of a download button heuristic further supports the malicious intent of directing users to external, untrusted resources.

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/nice-roblox-games-to-hack-game-hack In PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/where-to-buy-pubg-uc-cheap_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/tiktok-free-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-cheat-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-by-doing-tasks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.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_off00002edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDC 21940 bytes
SHA-256: 26d51fdccd946695ca490dc4543956236989deb24b66dc86833214611f74269f
font_01_sfnt_off00005f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 19036 bytes
SHA-256: 21e8008b45754fe4bf2a08ffd39ad71df1da62d8f7287d85198f8f92ff18db8a

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