Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a068a73bc676903…

MALICIOUS

PDF

36.2 KB Created: 2021-07-03 11:27:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 31108908ab067c5f65ca20e55573b22d SHA-1: 4ec5a5ee26718b2749b954bc4b60d6030245040e SHA-256: 2a068a73bc67690383a5ec2680488c33c02464ffe6a4a6e8b8c1f12bd0135530
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The primary malicious URL, http://netcdn.tw/app/406889139/coin-master-15-free-spin-link-today-game-hack, is repeatedly referenced in the document body and flagged by heuristics. The document's content and embedded links strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful websites.

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.tw/app/406889139/coin-master-15-free-spin-link-today-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/someone-hacked-my-account-roblox-how-to-get-robux-back_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-spawn-stuff-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-everyting-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-free-c_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_off000033d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D2 23500 bytes
SHA-256: 791702b4304ad0ee34f6ad61dea20017245d204ef933821e41bfb3b48b2d0f6d
font_01_sfnt_off0000690c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690C 18936 bytes
SHA-256: dade731e6700c356e43930ce2166ac8a04dff18bb71904978fd7c0d5f6a2bba6

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