Malicious PDF — malware analysis report

Static analysis result for SHA-256 f745c894fcd6bc1e…

MALICIOUS

PDF

45.7 KB Created: 2021-06-04 04:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 359affe09ece5835c9aef40594064947 SHA-1: 09b4a613a0c68398d71b17a764dbb4090404b333 SHA-256: f745c894fcd6bc1eb365a09d9acaeed1f183fd7692ddf237cc95a7ba8957f6f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body, though heavily obfuscated, contains references to 'Roblox Script Executor Free' and the malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to a malicious redirector.

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.online/app/431946152/roblox-script-executor-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/pokemon-go-basic-vs-premium_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-app_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-2021_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_off00004fdb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDB 27740 bytes
SHA-256: 6a24a6fca164f49da9a324292aefc51d8deda84f771e17a279fa874be41d25db
font_01_sfnt_off00008f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F84 18488 bytes
SHA-256: 6ea6bb0236530492a5726fbff6dc4038301159956e914e548a210a1fa14d9cf2

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