Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5fab4fc63365e4…

MALICIOUS

PDF

57.8 KB Created: 2021-06-03 11:29:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3b765fe17afffc69ddd1aab88ee1fa0a SHA-1: eb401973b03d65de55e78e6430eab6e856440225 SHA-256: 2e5fab4fc63365e4680238526415f4f18575c8d0a092351396d88aede44ad45c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and cheats. The primary lure appears to be a 'Coin Master Hack Software Download'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector designed to lead users to potentially harmful content or further exploits. The presence of a download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9612

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-hack-software-download-game-hack In PDF document text
    • http://librarystkippgribl.com//repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pubg-uc-ycom_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/black-jacket-with-blue-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000536d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x536D 27388 bytes
SHA-256: 64f6207a0509f30c9076ad26621744a85c921185fe580173630f26e51ac76b1d
font_01_sfnt_off000092d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D7 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off00009da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA2 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C8 18296 bytes
SHA-256: 3143ab5b0b8bd46f2f01096e2844859efc454ac8790b82692dc64774662bc370
font_04_sfnt_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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