Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c528ad15a7135ce…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 12:27:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8f6ae7b38a75bb12f267a7171357b0e6 SHA-1: 6cbbbd2bfd9b6527a6dacef98b590d4909c97b41 SHA-256: 0c528ad15a7135ce3262feeeaef1302f00eacdd4246180b6290bc3b264cc7bf4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/479516143/minecraft-free-install-game-hack. This redirector is likely used to funnel victims to further malicious content or downloads. The presence of a visual download button and the lure of game hacks suggest a social engineering tactic to trick users into clicking the malicious link. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/479516143/minecraft-free-install-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-lost-cheats_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/tiktok-free-folowers-jio_GM835599320.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-roblox-games-no-downloads-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/minecraft-pc-download-free-full-version_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302E 22272 bytes
SHA-256: 4f553472a02a3600156763e7728018904d9eff51184322c62bea90e854acf4eb
font_01_sfnt_off000061a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 17928 bytes
SHA-256: ecac4b827e849319c0c5044e9321c91e8ddddd01a8be4fd48df7e18ba0227d57

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