Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73f12241ef2e16a…

MALICIOUS

PDF

36.7 KB Created: 2021-06-23 07:56:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd1ba6df5db81509b07ba86da9cea092 SHA-1: bbc67c7971ab55b4463960a9626742198ee157f9 SHA-256: c73f12241ef2e16ada53bed5956f4d9c8b4bb7317f80f4bd93b54618e0843449
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to a redirector service, which is designed to lure users into downloading potentially malicious content. The document body and embedded URLs suggest a theme of game hacks and free generators, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/robux-mod-hack-game-hack In PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/shirt-id-for-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-hack-stats-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/hack-to-get-shards-in-roblox-shard-seekers_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/cheat-roblox-laxify_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/hack-script-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/pubg-uc-online_GM1330123889.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/roblox-hack-pro_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-minecraft-accounts-reddit_GM479516143.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_off0000355b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x355B 23420 bytes
SHA-256: 0f9c805b17926c07b31f9803b123fb5341f152a19c9694b72b5346080a8c812c
font_01_sfnt_off00006a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 19092 bytes
SHA-256: 6b074e329f65495532e16cc74b7744284953ac9718b31fc4af9a7db27f2f3d9b

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