Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3c1a3268de20f3…

MALICIOUS

PDF

35.6 KB Created: 2021-06-28 19:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0a8409978d105977e2891875df1411c SHA-1: 7c121566150047ea5c87a46881bc1a953e83151f SHA-256: 5f3c1a3268de20f3824a7e5ec240f463cdb57a741b4d36d7dd84044d9131abc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, specifically mentioning 'Free Robux' and 'game hack'. It embeds multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/how-to-have-free-robux-2021-and-exemple-game-hack. This suggests a phishing or scam campaign designed to lead users to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/how-to-have-free-robux-2021-and-exemple-game-hack In PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/mcpe-client_GM479516143.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/rbx-website_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-in-roblox-rocash-com_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-artmoney-hacks_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/robux-hack-copy-and-paste_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox-on-android_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_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
font_00_sfnt_off00003096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3096 22564 bytes
SHA-256: 26d2d93d4ec994567c6c8944aa5c332e8adfa23db93473df0265dd34c9b3cd68
font_01_sfnt_off00006310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 20080 bytes
SHA-256: e705196f0835b4949394008161665c6568a72238e064d72d1f806ed5633e2abc

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