Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d928db3b80dcfb0…

MALICIOUS

PDF

33.6 KB Created: 2021-06-25 21:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f806147c6cace24ada4a3033f9bfdef2 SHA-1: 367814ef7c4d4b4a23bc9b8506a8ff196678f6bf SHA-256: 2d928db3b80dcfb0062cdf89f1d8ab47e20ea3131819b5871b8eb7da70b61395
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to redirectors and link farms, masquerading as game hacks and free item generators. The primary URL http://netcdn.co/app/431946152/free-easy-robux-codes-game-hack is identified as a malicious redirector. The document body and heuristics indicate a lure for users interested in free game items, likely leading to further malicious content or potentially unwanted applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-easy-robux-codes-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hack-robux-official-site_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/cheat-codes-for-zombie-apocalypse-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-pokemon-go-joystick-2021_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-lets-party-gear-testing-speed-and-jump-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-link-spin_GM406889139.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_off00002d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D69 22012 bytes
SHA-256: 1335743d8c2447a9cd5ae9cd071ae52d5346ccc8b148df3dabdf224581cb19ac
font_01_sfnt_off00005e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 19072 bytes
SHA-256: c179be4c9985bafdcc86b0d481c6a38c285ab2ecef59e432d76ecc3ef931b916

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