Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d1222e7e5c9ba1…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 01:17:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f2db0b89875a1c760488dbaa4954afc0 SHA-1: 831d357f94efa240c2b97f26500ed965299f4046 SHA-256: 97d1222e7e5c9ba1f53be709649234e1072cec47ac79a64eb189c31505668e7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.tw/app/406889139/coins-master-hack-game-hack, which likely serves as a gateway to further malicious content or phishing pages. The document's structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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/coins-master-hack-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/runthisrobloxcheat_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-scr-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-redeem-card-hack-pin_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/tiktok-free-gift_GM835599320.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-free-no-survey-real-2021_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
stream_002_off0000306e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x306E 22756 bytes
SHA-256: 6a94a1171c7b7870550d50a323ed0401408fa9b33138a863db2933749e090c4f
font_01_sfnt_off00006354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6354 18004 bytes
SHA-256: 0f5586fad8963a3d66dcc08ea216a344d94ecc2f9eb49a7a48818ccd749a571f

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