Malicious PDF — malware analysis report

Static analysis result for SHA-256 4571e04f65065485…

MALICIOUS

PDF

46.6 KB Created: 2021-05-12 14:32:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c15e83e63da97029b2e090f9ed94e35 SHA-1: c8751a9d5c7768b534d23759b9cf46667b6c80c8 SHA-256: 4571e04f65065485b150059467789d4a5b0dff177ca54dd54d3e0db1f6df13bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to known malicious redirectors, including one specifically for a 'roblox-free-pants-game-hack'. The document body and extracted URLs suggest a lure for game-related cheats or generators, a common tactic for phishing or malware distribution. The presence of embedded URLs and the nature of the lures indicate a likely attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/roblox-free-pants-game-hack In PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004980.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4980 28272 bytes
SHA-256: 20bc3ec82d071303906cab34ac8da6f8814fdf7e7b01fb9024f068def0b18592
font_01_sfnt_off00008945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8945 2880 bytes
SHA-256: 552e62132cae3603ce0819827e44d96a992bd06014cc5080bf3af4b2ea155b3e
font_02_sfnt_off0000931d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931D 18436 bytes
SHA-256: 78f3703c71bf5a91131aef5e2f3ca285f6435d0e4871a8e776917510e9a384af

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