Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fc5809babf309b…

MALICIOUS

PDF

34.6 KB Created: 2021-06-20 10:20:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 28e767ed09c1c909d49f2afe1c4a63e9 SHA-1: 99fbd79a5758699d67bf0b8b25d92cbbf2028cca SHA-256: 97fc5809babf309b11ca96f06b8c5ecc617d6ab6a34d3b4ca905d142eed02e6b
200 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirectors and other PDF files, all promoting 'free generator' or 'game hack' lures. The document body and heuristics indicate a clear intent to trick users into clicking these links, likely leading to further malicious content or exploits. The presence of 'cmd_GM431946152.pdf' in the document text suggests an attempt to disguise malicious activity as a command-line tool. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or exploit delivery workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://netcdn.co/app/431946152/ways-to-get-free-robux-2021-game-hack In PDF document text
    • http://perpus.stikesphi.ac.id/repository/get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/berby-novedades-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-roblox-robux-with-cmd_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn macro / runtime command snippet
    • http://perpus.stikesphi.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-buy-promo-items-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-generator-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-hack-robot-animation-script_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/does-pubg-uc-generator-work_GM1330123889.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/best-free-script-executor-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repositoryIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F49 22092 bytes
SHA-256: a8806c07f88b92812d5e869d5ffde1e2f143528888372c49bafd6cbc637becd8
font_01_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 19600 bytes
SHA-256: c00d54827bcee88cdbe96b013b7ed3ba2b531ed1e4e5548e429b871c3375097c

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