Malicious PDF — malware analysis report

Static analysis result for SHA-256 76414bf86e195cd0…

MALICIOUS

PDF

46.2 KB Created: 2021-06-04 05:36:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 170e1e688a421a1b037900ddc7545b86 SHA-1: 6a25b275a4b60d6799edaac9f5f9a1328e56232f SHA-256: 76414bf86e195cd02a45344a7946664c42171a537e1dfb75718f3e74d5b77f0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as free game hacks and generators. The primary malicious link identified is https://netcdn.online/app/479516143/minecraft-bedrock-free-with-java-game-hack. While no scripts were extracted, the PDF structure and heuristics strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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/479516143/minecraft-bedrock-free-with-java-game-hack In PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-for-kids_GM431946152.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_off000052a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A8 29868 bytes
SHA-256: 00fa75cbd1cb49599e7f5c391f07b736a728396e11b7a9019f6f90fdd4f5daf9
font_01_sfnt_off00009080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9080 18912 bytes
SHA-256: 4030f6649d0ebdd9f19ba86bdfab3d907e637ec7756e67114778b3c35e301262

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