Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dab1bd2bfb4a6f1…

MALICIOUS

PDF

36.1 KB Created: 2021-06-25 23:49:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1808149ce2ed42a37d1af42390947762 SHA-1: bb1a5a53510e82e59c69fd67460051d904a19bb4 SHA-256: 9dab1bd2bfb4a6f1e39194c8fc8ef7c13ead73a60f0e932b9f97112c282122bb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure the user into clicking on a "free generator / game hack" redirector. The ML classifier strongly indicated maliciousness, and the document body confirms the lure. The primary URL http://netcdn.co/app/431946152/where-to-buy-roblox-clothes-for-free-game-hack is likely used to download a second-stage payload.

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.co/app/431946152/where-to-buy-roblox-clothes-for-free-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-tutorial_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/mathep_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/snaypes-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/eviction-notice-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-without-human-verification_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
font_00_sfnt_off0000329d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329D 23100 bytes
SHA-256: da535b751f21f3077552404a2f65f93c072b7185d7b7c10f844e1af708775d2c
font_01_sfnt_off000066d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 19436 bytes
SHA-256: 5bf0e9793d53f0ae554aa30263a682bc1ee9e907f5190726a735dd583c7594f7

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