Malicious PDF — malware analysis report

Static analysis result for SHA-256 77600daec65b3436…

MALICIOUS

PDF

48.6 KB Created: 2021-06-04 01:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5ee5566e6cccdc580ab28bdd37ecbe8b SHA-1: 48db788b6cc03dee4f1af50fbc18f1f58800e2b4 SHA-256: 77600daec65b3436fdde5ad0f856fa4449b9a822bee3920b208c163d3a6f7229
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically mentioning Minecraft on Chromebook. This lure, combined with the presence of a call-to-action button and the document's overall malicious classification, strongly suggests an attempt to trick users into downloading malicious content. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-minecraft-on-chromebook-for-free-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-assassin-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.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_off000055cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55CC 26400 bytes
SHA-256: 0e5b8dde678b73691caad08bb3ae27fa0b97a7f586616cd6eb9da9a39278db41
font_01_sfnt_off0000907c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907C 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A67 18628 bytes
SHA-256: f21871f293e1374cce8b481ffeffb78eba3f21dd05dabec399dd2d571c50d8ba

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