Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebd72625460bbdf…

MALICIOUS

PDF

45.8 KB Created: 2021-06-09 15:47:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1abe049349e124dce433fd411d01aa26 SHA-1: 6a7c2fc95f3e67e6c7cd51064175d887e67f1c13 SHA-256: 6ebd72625460bbdf8f35e98cdf5bacb5334f5212efbc1484c019d0665ab1288f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and robux. The document body, though partially corrupted, contains the primary lure URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-robux-promocodes-no-hack-free-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/pubg-uc-kodu-yazma_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/hack-para-tener-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pokemon-go-free-version_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/code-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-fly-hack-in-roblox-deathrun_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-free-exe_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_off000053b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B6 25588 bytes
SHA-256: 8346641b447919aeb109493be0ae2cacda547f4a0391b53a013081aa497a98ae
font_01_sfnt_off00008e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7A 19072 bytes
SHA-256: c676fb694440ae1c5e6f4ee24f1b3cbc2ef4ebca670f2bfc0661ea32548ef6be

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