Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fba36989981bc3…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 10:45:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ee4bbc74c08dd724e416cbad8c30cb4a SHA-1: 0997b039e0c304e93d3d1857cb70541199a58753 SHA-256: 28fba36989981bc352bc08c7ffafe189d68e7098137ca29fff55f6b89f810c09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure appears to be a 'Coin Master Free Spins Link' which leads to a redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to 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.co/app/406889139/coin-master-free-spins-link-31-march-2021-game-hack In PDF document text
    • http://library.unissula.ac.id/fk//repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-cheat-engine-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-infinity_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-items-by-inserting-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/generate-robux-for-free-with-no-downloading-games_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/daily-coin-master-free-spin-apk_GM406889139.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_off00002e74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E74 23096 bytes
SHA-256: e5475fe709a5824d96fb77edcb2e5df4176f4342fee6b6821f65097a7992633c
font_01_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 19088 bytes
SHA-256: 4c8ff383bfc675ee23c699e868c0decf1b9f6417ddc692102889bda26189b506

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