Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe3c4b8d412d38c…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 22:17:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7fcacc41a12d112c04115aad21ff96a3 SHA-1: 4e1e5e4b582fade18f97f05fba16f098f119d1a7 SHA-256: efe3c4b8d412d38c0a60041c1262b3f75d413e2b6e554ba53b0a3ebb000b162b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/free-robux-codes-no-verification-2021-game-hack PDF link annotation
    • https://perpustakaan.unitomo.ac.id/repository/roblox-royale-high-school-cheats_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/cheat-engine-67-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/hack-any-tycoon-roblox-win10_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/esp-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/cheat-codes-for-bick-cars-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-redeem-card-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/robux-hack-apk-android_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/download-cheat-engine-for-roblox-winter-crisis_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-catalog-free-items-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-dentist-game-online-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/best-jailbreak-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/robux-gratis-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-do-u-get-free-robuxs-on-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/pastebin-roblox-free-catalog_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-hack-account-pastebin_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-no-human-verification-not-clickbait_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-does-free-follower-game-real_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-hack-robux-apk-2021_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_off00002f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F31 22032 bytes
SHA-256: 431c8abacfb6cca167f9ebbcefe0262e5e2953fb9d11a8e0259e098e18b06938
font_01_sfnt_off00006015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 19648 bytes
SHA-256: c9b5e446bd4f49308c598e64be383601662d64f1913011d813836102a9eea03a

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