Malicious PDF — malware analysis report

Static analysis result for SHA-256 2689b51cbd10664c…

MALICIOUS

PDF

33.6 KB Created: 2021-08-01 07:26:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 956eb638df399fe71058285c827f3fb8 SHA-1: 64f7545dbcf5d7854155f6277f78832e9aefeadf SHA-256: 2689b51cbd10664cca43f58b44863f30d7a38f86c74b99418f0baa182ef4d428
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free game hacks' or generators. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/479516143/minecraft-free-ios-game-hack In PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://e-learning.man3kotapadang.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacked-client_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_off00002f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F95 23268 bytes
SHA-256: 9c9ba9553e6715cc8aa32e86a0c416a6f66551e3cec27283716889e04aada015
font_01_sfnt_off00006313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 17712 bytes
SHA-256: 54d91aee1a0896e30cfb652b9b9fc91e7951cfaa65da7a48657c461bc2dd637d