Malicious PDF — malware analysis report

Static analysis result for SHA-256 339a25b0e47c1411…

MALICIOUS

PDF

50.0 KB Created: 2021-06-09 00:54:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3da6fe4c6668c128745a5c5106eafc63 SHA-1: 6af05ac7f66a60113d7704f743178dc099df034c SHA-256: 339a25b0e47c14113d6cd9c59571039466e8cb8ee40ccc16a3ab0f29342a1028
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free generators" to lure victims. The primary malicious URL identified is https://netcdn.tw/app/431946152/free-vector-roblox-logo-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-vector-roblox-logo-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-leggit_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000535c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x535C 26460 bytes
SHA-256: 72047e500fbdb0193b566fb93a2858ffe7e6a7907da39c231f18ad3d0cafb568
font_01_sfnt_off00008fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDE 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off00009fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FEE 18476 bytes
SHA-256: 1b4c3532de0d8cc647ddb270ee1876be124c88b2776365076e61c092a1510bc9

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