Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b53f919cfda51c…

MALICIOUS

PDF

46.3 KB Created: 2021-06-04 00:49:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de936eb29479fb493b0f18a6c00477be SHA-1: 3714b189e626c37a66c6b0b1d7fdf430a7046878 SHA-256: 98b53f919cfda51ca62b3a4a88f148f4221f75b86e4f46bf2270c301e6032f5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically promoting a 'Coin Master Free Cards Hack'. The embedded URL leads to a known malicious domain, suggesting the document's primary purpose is to redirect users to potentially harmful content or malware. No scripts were extracted, but the PDF structure and linked URL are strong indicators of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/406889139/coin-master-free-cards-hack-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/is-there-a-way-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-glitch-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E1 24800 bytes
SHA-256: f7e9d67cd15947fba6002029a40c70e3befe8a633f27be862b464fb5b15e0248
font_01_sfnt_off00008964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8964 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00009302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9302 18056 bytes
SHA-256: ad4f2d10031887feff52537d65cf9a04719575ebe7be64232d8e0b4f73fdfdc1

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