Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9358f727c4e3fd…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 17:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e139d8e419a2540ca49795120028c2f3 SHA-1: f96298454aae73c98520df886c504ff45098c82b SHA-256: fc9358f727c4e3fd71a3c0d39c85ce2cff947826cf2a3aae695aa2c6716aed76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The heuristic firings indicate that these links are known malicious redirectors and are part of a lure for game-related cheats. While no scripts were explicitly extracted, the document body and heuristics strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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 http://netcdn.tw/app/431946152/free-roblox-account-generator-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/pubg-uc-free-link_GM1330123889.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-fly-in-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-roblox-jailbreak-teleport_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-le-robux-site_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/como-conseguir-robux-con-hacks_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • 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_off0000349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x349C 23020 bytes
SHA-256: 0ba64a6b7b68b30ca36a83e82976336685d3899422807e7eab3a08dad7c96522
font_01_sfnt_off0000689e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689E 18896 bytes
SHA-256: bb9e6463d1c81a2a547d1690b1a8e73c4c12e3f7068d53863442e88dfdb98424

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