Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f6fc53f71b72d7…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 11:05:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2fcf244357260d95d2757ad2409c3bb6 SHA-1: 71dc42d4f583bb38d3073e225547249e1d2ca871 SHA-256: d2f6fc53f71b72d7b43510bd6264be36830bf253995229712698b07f82d21b33
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a redirector hosted at 'netcdn.tw', which is flagged as malicious. The document body and embedded URLs suggest a lure for free game currency or hacks, a common tactic for distributing malware or conducting phishing. While no scripts were explicitly extracted, the PDF structure and malicious links indicate an attempt to redirect the user to a harmful site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/mathep-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-218_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/case-clicker-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-human-verification-2021-website_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-wallpaper-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-boy-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-coin-master-credit_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
font_00_sfnt_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 22056 bytes
SHA-256: 530d5543625b4492d7b6aa621070cbc0ecbb5585f6af44807e3e9fa7a20a1dc4
font_01_sfnt_off00006079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6079 18544 bytes
SHA-256: 49092de834d3f8fc0161edca5c8ffc9035116622ffbf8cd5420aeadd749a8349

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