Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cce9f9c974a68a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 01:31:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9558b36f12b45bece97e24cc5abf0f4a SHA-1: e3ad168098c87c76396383177926fe2374e32bbd SHA-256: 54cce9f9c974a68a7b2769d7b46c5951534165c797caffebc26b8958ebc18b99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a prominent call-to-action, directing users to a known malicious redirector. The content explicitly promises game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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/hack-coin-master-game-apk-download-game-hack In PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/release-boku-no-roblox-remastered-free-lvl_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-for-xbox-for-kids_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-robux-hacks-that-work_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-hack-download-free_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/hack-robux-using-goo_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/hack-fly-roblox-2021-may_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-boxing-sim-hacks_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/jailbreak-roblox-hack-mega_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/click-kill-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-download-free-online_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_off000030b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B0 22876 bytes
SHA-256: 2673b5fd07650c20e43196f83a5e03d810fd93e2e8f79e23783692ff1ecd7fb1
font_01_sfnt_off00006383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 19020 bytes
SHA-256: 44af2786720a0a2ae12260f8c83a457bff635c12deb4555913cd7afcce07352d