Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42ffb4a46ecdadb…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 03:49:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 662a85f3c8cad39a0b6dcd9a52515246 SHA-1: f5948ae34a0390c05e2f156181b1b9ec145acb4a SHA-256: a42ffb4a46ecdadbdc3d5f84437428c3bd03a61dcfb3606fc8b1514e30fe0e3b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. The embedded URL directs to a suspicious domain associated with such lures, indicating the primary goal is to redirect the user to a potentially harmful site.

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/431946152/roblox-synapse-hack-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-ful-colour-brown-pant-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-game-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/gun-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/redline-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-crossed-out_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-2021-robux_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_off00002ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE6 21436 bytes
SHA-256: ca83a046e45e3a0c443e9106406825f032253bfc5e70d3a27ef303b5c0417f7e
font_01_sfnt_off00005de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 18824 bytes
SHA-256: 9e138f533a93810407c82d8a61526b20a107c3620de1b0d2ac20c4f7b07dc7b5

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