Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f1bf6e62cdd0af…

MALICIOUS

PDF

41.2 KB Created: 2021-05-13 23:32:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 292f37d264b2711b07c35dcd9787b0cf SHA-1: 09c18d3ebaaaedd135e2de17feaa85dff3006f93 SHA-256: a8f1bf6e62cdd0af97d47e734757d3235c9f1eecad2acc813863d66d56ea2e4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/spin-coin-master-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack designed to lead users to potentially harmful content.

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/spin-coin-master-free-game-hack In PDF document text
    • http://www.psychom.com/storage/editor/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/robux-win_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-to-get-infinite-robux_GM431946152.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_off00004852.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4852 24500 bytes
SHA-256: ce240b4198a3672c88fbb42f916ab5a4c886efc22aab3a5e06fc4c6fb386e545
font_01_sfnt_off00008003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8003 17884 bytes
SHA-256: 6361ede382a163d704ed6c8f102c2990305f9cba1a2540397fd15e2a8f655622

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