Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bd3405745760b5…

MALICIOUS

PDF

38.7 KB Created: 2021-07-06 01:59:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 46da9b8889b546fa535b438d93fa3eba SHA-1: 3d7b2390b02949ca38d915ecdae3749ba15ac152 SHA-256: e4bd3405745760b5295ea310efabe90fe58a4efbaeb485769a57ded13ac09b4d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector, that lure users to websites promising free in-game currency for popular games. The document body and heuristics indicate a scam designed to trick users into visiting these sites, which likely host further malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/431946152/roblox-free-robux-generator-game-hack In PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/proxo-roblox-hack_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/free-robux-pc-generator_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/pubg-uc-kr-version_GM1330123889.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/is-uc-pubg_GM1330123889.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_off00003f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F8D 22876 bytes
SHA-256: 423d81192c9c0dab6d1241da6ed8a690088897d3ce3f0391868e1d9eeb290dc9
font_01_sfnt_off000072d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 18896 bytes
SHA-256: a8435c37e47e08e896321e6274f2685d30d248d21a2818cac5b51dec603f27f9

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