Malicious PDF — malware analysis report

Static analysis result for SHA-256 043a073755c7ae9c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 23:57:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7121e2121b0b538f26a0d8a57044759d SHA-1: 557ed868429abe5357f509318619119193eeb814 SHA-256: 043a073755c7ae9c8bbb66645ed96ab05e6df97d0249d5336a61f2332cccf5b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising free in-game currency or hacks. The document body text and heuristic firings confirm the lure is related to 'Free Robux' and 'Game Hack' generators. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-robux-without-offers-game-hack, which is flagged as a malicious redirector. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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/free-robux-without-offers-game-hack In PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/without-pokemon-go-free-evolve-after-trade_GM1094591345.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/apk-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/roblox-interceptor-hack_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/roblox-if-you-got-hacked_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/roblox-aockolupse-hack-mod-menu_GM431946152.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_off000030f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22952 bytes
SHA-256: 4fa5f1d30a788d62c13b0cfc2b35f0b010bd670bde4fc15c3c6681f7b4cb4928
font_01_sfnt_off00006378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 19304 bytes
SHA-256: d28279064c80375efd82c55b38a8139998c8ec291e9a82c1a232f0005e70f64e

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