Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a21463660fbcb69…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 07:44:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1f2f4c598571b38ce249bcaa1ded0412 SHA-1: c0eaf322127347d0cb5c898a720db470ca4a3d52 SHA-256: 0a21463660fbcb695897b5bd9f6561512510367c7feac808edff1decc02b40e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the lure suggests an attempt to download a second-stage payload or redirect to a phishing site.

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.co/app/431946152/free-robux-generator-2021-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pastebincome-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/https-wwwrobloxcom-games-202120216-hackedjailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-201-exploit-free-lvl7_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-easy_GM431946152.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_off00002eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAB 22276 bytes
SHA-256: cee20a6351fb32d3a7990e579dd0f2e27544477f818c6e56226fc83c9590d420
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 19224 bytes
SHA-256: e428ca4c21c8feda58ff9d2cee9e63eb7b19a929803cf1f6eebeef0755d1c14a

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