Malicious PDF — malware analysis report

Static analysis result for SHA-256 e920d902a3e0d8df…

MALICIOUS

PDF

56.2 KB Created: 2021-06-03 13:01:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6572fa62b449ac86c8f15b54b3799895 SHA-1: d7b5873ef766eabb45725cf7cc184761ab0ec141 SHA-256: e920d902a3e0d8df7be535ad669b8a8a60f31647181c21b485d993ac6fce6e3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The ML classifier also flagged this PDF as malicious. The document body and extracted URLs indicate a social engineering attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/431946152/robux-claimer-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A5 27464 bytes
SHA-256: 349f2cf9e6a4f5bb10af5095a791df0f8833589cc517f24b991f2f5a8a27d18a
font_01_sfnt_off00008f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F55 8760 bytes
SHA-256: a8e3e1e9629086b3626933b3385cf14cf8abb527a16a22783acb9d4d6e0a5d3c
font_02_sfnt_off0000abe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABE2 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off0000b88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB88A 18532 bytes
SHA-256: f8d3cbf6c99adbc4a00682e2952441b72e35b63b7e0e02c452fe01b9b955693e

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