Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c98644f8e58611…

MALICIOUS

PDF

41.7 KB Created: 2021-05-18 02:51:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c35bac909c7e31319d3685b20a178ba0 SHA-1: 4d56c9289f11044fe69b4540dcb26adf8fa33920 SHA-256: b3c98644f8e586114f13c103bd14a65fb2e7acbcd60b5b7669d914833cab675a
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 a "Coin Master Hack Download". The document body and heuristics indicate a lure for game-related cheats or hacks, designed to trick users into visiting a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-download-android-game-hack In PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/robux-download_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B8 24584 bytes
SHA-256: b09089758c6a756a4da742ada9c71649945d5f05b4c885fdcfa9a0cbd3a3ed9c
font_01_sfnt_off0000807e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 18296 bytes
SHA-256: 191b71f27c87c49ec840916d543df80ed5baa55fcebbf61f3d10def48a18baf7

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