Malicious PDF — malware analysis report

Static analysis result for SHA-256 832a4e03d4418f81…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 06:06:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25c768b3fd9e52b804e5c2c2238050e4 SHA-1: 720d786036cbb49e4917b25c0c7ac87334cd0066 SHA-256: 832a4e03d4418f81e29dfe20befb2cb570c2737ff0cd0dc480563c75c028175d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering game hacks or free items, indicating a lure for users to click through. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/free-t-shirt-roblox-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-to-rm_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pokemon-go-free-yellow-team_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.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
stream_004_off00004f46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F46 26868 bytes
SHA-256: 57bc562c12f17595db2db5f6eb77e2f4e04c9035a21390ce82406b568427f5ff
font_01_sfnt_off00008bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDB 18340 bytes
SHA-256: 2d05e254e9d88d662aa6e20ca1badb4d8e3c9bd921fc5d0ad34db7ef5b503ac5

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