Malicious PDF — malware analysis report

Static analysis result for SHA-256 300bda41b69b5851…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 15:42:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a22e5c16a13a0bd0d701e4c8d976b90b SHA-1: b5ad752f21cf0a27cf5a32831e737353dae3aa9a SHA-256: 300bda41b69b5851c8b249c7fb8fcfa440b25bf27bd7e7dc9fcff49bb53d0a17
160 Risk Score

Malware Insights

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

This PDF document employs a lure to trick users into downloading a "game hack" application. It contains multiple links to redirectors and potentially malicious PDF files hosted on `e-mailservis.cz`, which are likely part of a phishing campaign. The presence of a download button heuristic further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-mod-apk-unlimited-spin-download-free-full-version-game-hack In PDF document text
    • http://e-mailservis.cz/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://e-mailservis.cz/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://e-mailservis.cz/images/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://e-mailservis.cz/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/free-spin-coin-master-hacktoman_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_off00004b69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B69 30548 bytes
SHA-256: f77ae14f2ff135c07e1ce2d49dab32a139cf2765f464e4df89ad85f53aef91a8
font_01_sfnt_off00008dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFA 19356 bytes
SHA-256: 92ce47a29f6b22b41a3f27f468cf2ba8cb02212e9ac17cc8e0fda8e64716967c

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