Malicious PDF — malware analysis report

Static analysis result for SHA-256 54855a4656f87b2d…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 05:19:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 996dd703f811ffea5623b222e64431f2 SHA-1: cbcd98334ae62ddd2d8c6fa0824ed4e6c9ff7a0b SHA-256: 54855a4656f87b2dd2f5c974637240c56fca84c1f5252124c3a416a6e8e56cab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that point to known malicious redirectors, specifically advertising 'game hacks' and 'robux generators'. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click these links, which likely leads to a second-stage download or a scam. No scripts were extracted, but the embedded URLs are the main indicators of malicious intent.

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/working-greasyfork-robux-hack-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/app-cheats-online-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-on-ipod_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-1-min_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-robux-hack-2021-no-survey-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-booga-booga-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-the-conquerors-3-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheat-roblox-bad-business_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-to-get-robux-2021_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_off00003462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3462 22188 bytes
SHA-256: 8893667dd78f37201cbb9cd9cdb8850e2805bc8c8fbff48f1f751df8deb42f07
font_01_sfnt_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 19220 bytes
SHA-256: 8dd62546358c0d136ea1b97869c51cf3b5657081cf9b4a08f4582aaff267c058

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