Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caca2f04e83cbf6…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 18:22:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 546bf5850a722cd429679da76f028148 SHA-1: f46147ad838d4acd4ddc8edc1ccc0abb98f1f44a SHA-256: 2caca2f04e83cbf6a75ac13fccc9a1fff00553faa85ceb0e9d0808812b5847aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free generators. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-apk-free-download-game-hack. This indicates a social engineering lure to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing or scam attempt.

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/coin-master-apk-free-download-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-buying-it_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-downloader_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-game-no-password_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-para-jailbreak-2021-roblox-de-sontix_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/citixen-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-r-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-denisdaily-roblox-account_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/l-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/www-bloxburg-club-free-robux_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
font_00_sfnt_off00002f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15 23128 bytes
SHA-256: 7517dd0c966ee64de67e9091131a3c74a05e8783d221bd9f8e206705c6257f39
font_01_sfnt_off00006330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 18924 bytes
SHA-256: 80f479f2842c7b63956049059bb64ea40ae3b1cb380eebc5b1a49b0c67b59a51

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