Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48752c7f394cfda…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 11:54:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8dbe928a043995523efec8bc88e0bf08 SHA-1: 9f03eb3b2034756c16daa89f1868ac3d23a6586b SHA-256: e48752c7f394cfda5940c340c161598df39ca727bdfccce32e81861f9ce15dee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting it is designed to trick users into downloading a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs indicate a lure related to game cheats and free spins.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/coin-master-free-spins-instagram-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.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_off0000505b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505B 24780 bytes
SHA-256: 563761664854c98c3ea26d13cafdaf5c74a64d61bd519b8b749bb30ac6c0001c
font_01_sfnt_off000088d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D5 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00009273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9273 18432 bytes
SHA-256: ef485384b16ba62939d434f3c696efe80cfbbe4aa703f6c70ac28915b77e8923

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