Malicious PDF — malware analysis report

Static analysis result for SHA-256 291989b38a65aae7…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 23:56:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 03a69707fe5daf0be91df36a342e817f SHA-1: c7da6bd851d86a8393568b7f56d8ab40c57e80f3 SHA-256: 291989b38a65aae737c831d80670ee4855867033edf8f60e1f375adbc26caf19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDFs, all related to game hacks and free items, indicating a lure-based attack. The primary redirector URL is associated with malicious activity. The document body and embedded links suggest a social engineering tactic to trick users into visiting malicious sites, 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.tw/app/406889139/free-spins-coin-master-legit-game-hack In PDF document text
    • http://winnerwater.com.tw/image/data/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/robux-hack-computer-no-app-download-computer-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/hack-robux-using-chrome-web-store_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/gamekit-free-800-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/nicsterv-robux-hack_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-nerd-glasses-roblox_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-on-cliam-free-robux-button_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-roblox-accounts-v3rm_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/cheat-roblox-kick-player-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/dayz-3-beta-roblox-cheats-cods_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F87 22800 bytes
SHA-256: 18d1d5e5bf2dbaed40890fd228c4824485f7bae5b02efc5688b680e0f57f16e3
font_01_sfnt_off000062b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 18176 bytes
SHA-256: 7af7e664eae1258314b3ede69216354f229cfa04ce1bca37a5b2e9287da6bc4d

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