Malicious PDF — malware analysis report

Static analysis result for SHA-256 477c9f599bb28449…

MALICIOUS

PDF

44.1 KB Created: 2021-05-12 22:16:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 79ba12c9f89faeed42eebbd642be3d67 SHA-1: 23e8e8e91b777e26a2f537b7930aa76eb759838f SHA-256: 477c9f599bb28449f2dcb6eb128270590294e2be71d8a84fa99e23d781705ad6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link that redirects to known malicious infrastructure, specifically advertising a "free coins coin master spins game hack". This lure, combined with the ML classifier's high confidence, indicates a phishing or scam attempt. While no scripts were explicitly extracted, the PDF format and the nature of the lure suggest potential for embedded JavaScript or other exploit mechanisms to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/free-coins-coin-master-spins-game-hack In PDF document text
    • http://adravietnam.org/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000473f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473F 25256 bytes
SHA-256: 6f32fa9e75216ff322bc36910080e7d66d3f401ad38f1975c7781f87c0de5381
font_01_sfnt_off0000812d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADE 17884 bytes
SHA-256: 2acdf213e8e807bc487a80aadd43e8577e55ab076d243b65afc8816f4882cfa2

Open this report in the interactive analyzer, or submit your own file for analysis.