Malicious PDF — malware analysis report

Static analysis result for SHA-256 8596c88cf560e308…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 07:44:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d11116538d4c442a499b8689bf82f505 SHA-1: 01ac2e4df6f20a918ec03a35f9463c030001178c SHA-256: 8596c88cf560e3082f88b5ef4a1db039a4f8c5e1abbcf8b830d53fdaf400452e
82 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on luring users with promises of 'game hacks' and 'free currency'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The document body, though partially corrupted, also contains similar lure text and the primary malicious URL. The ML classifier also flagged this PDF as highly malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/legit-coin-master-hack-no-human-verification-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/free-tshirt-roblox-nike_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-hack-november-2021-no-wait_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-proxo-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/mathep_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/ooby-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-girl-hair-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.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_002_off00003164.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3164 22784 bytes
SHA-256: 69d7b0527727d94540e0b1389b0f5f05bd02661c43c3099c8de75c494f77dd5f
font_01_sfnt_off00006464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 18540 bytes
SHA-256: 944ef90ac3957acf4ab0155e17f54942f1cad929ef859b36db5d7006f4b781e4

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