Malicious PDF — malware analysis report

Static analysis result for SHA-256 3429b15e18f103a9…

MALICIOUS

PDF

23.4 KB Created: 2021-07-06 05:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5f6b67eb68837f0107b6a1e77f9df6b9 SHA-1: e9c0ad6c5d4fd0aa0bf167574b816190315ec840 SHA-256: 3429b15e18f103a9df2dc757dce8a3e97bb4ed2d6b673c832a7b6323a046f38f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising "free generator / game hack" lures. The primary URL, http://netcdn.tw/app/406889139/coin-master-3rd-village-free-2021-gift-card-game-hack, is directly associated with this malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 3

  • 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.
  • 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-3rd-village-free-2021-gift-card-game-hack In PDF document text
    • http://librarysenior.com//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/pubg-uc-2021-trick_GM1330123889.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/pokemon-go-free-incense-promo-code_GM1094591345.pdfIn PDF document text
    • http://librarysenior.com/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-money-in-farm-world-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/make-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coin-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-premium_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-infinity-rpg-infinite-money-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 22260 bytes
SHA-256: 0a49c1273baec5563b214a17eceb2da64932adedfbcc0d356638d48ecf7b4218

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