Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d29eb77ba16215b…

MALICIOUS

PDF

46.1 KB Created: 2021-06-04 00:33:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7f272c4395348fe3295c2f702c46b0f2 SHA-1: b3f75cef3b97a551d8f858eea2092a1b7908f055 SHA-256: 4d29eb77ba16215b5a0e511748dd710acaec3157eab07d5026be6d0b9feeb12b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a lure for users to download a file. The primary URL, https://netcdn.online/app/406889139/free-coin-master-game-game-hack, is likely the download location for a malicious payload. The ML classifier also flagged this PDF as malicious, increasing confidence in its suspicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/free-coin-master-game-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-game_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_004_off00005000.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5000 24516 bytes
SHA-256: be775122d0b7013bc04f819b669524e738f64c3f90ee943901eaff605f55fcc1
font_01_sfnt_off000088a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A3 2880 bytes
SHA-256: aa3d9316068b9037d3bd098234d4f028cff103c619c9dd7dfbf18a3fc4a03b16
font_02_sfnt_off00009290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 17968 bytes
SHA-256: 26c9c4b875abe90d5a203e632a25aafef6162dffda8186c61deacbdf7b71a521