Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d03064b1d21a49…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 07:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4e2ba2a56055668df36dd70140f5b191 SHA-1: af972fcb08a756674b79326a1d90c1a4eba81bce SHA-256: c5d03064b1d21a4983bb72150d24b8cc7df58c373c7e5a895f81c15ca5b4cf3c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to "Coin Master Game Hack" and contains multiple embedded URLs, one of which is identified as a malicious redirector. This redirector likely leads to a site designed to host malicious content or facilitate further compromise. The presence of a visual download button further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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-game-hack-kaise-kare-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox_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
stream_004_off00004e99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E99 24856 bytes
SHA-256: 2b12286aff3b494ffee020b0434475ea6382840b63e1a0e779151aa750475497
font_01_sfnt_off000086ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BA 17976 bytes
SHA-256: 93d51bd6cc8dca2fcf120d66eaf858cb2e1f1423e05031688726c7fa24ff8db4

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