Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed38606494bb47fd…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 22:44:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 76440078b75cf87a533bf32ea19fe5a1 SHA-1: 0e2c0db65bc049c2d4af871907d4519f5a3289dd SHA-256: ed38606494bb47fdf7c56deb253f611ea4b362f2a093d96ede21b5f41f776d94
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a malicious redirector link disguised as a lure for free game hacks. The link, 'https://netcdn.online/app/479516143/free-minecraft-java-server-game-hack', is flagged as malicious infrastructure. The document body, though heavily obfuscated, contains references to similar lures, reinforcing the malicious intent. No scripts were extracted, but the PDF's structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/479516143/free-minecraft-java-server-game-hack In PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/tiktok-free-3d_GM835599320.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005061.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5061 24400 bytes
SHA-256: ba75e77ddbfe62f6562f5d00c5a4af14ae2df17a4024d1876ddaabdc0e5421f5
font_01_sfnt_off000087f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 3092 bytes
SHA-256: 1aa0e4457f2fdbd20c643bc065edafaa683fd9dc2930c01c4492bce0fd9a7f02
font_02_sfnt_off000092a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A1 17848 bytes
SHA-256: c817850addb7f4586eab0926175a8ce7be5c169962767968ade405e83d703cb9

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