Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ec688692f8bf60…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 16:02:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e9b0f57fb9efdae36452bc2f72aefdc SHA-1: 92e8981f39964c56615f51aec2c77bdeb0478eab SHA-256: 40ec688692f8bf609906799a49ba59ed2260cadd2fa69c034358d870b469daa8
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.tw/app/431946152/youtube-roblox-robux-hack-2021-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-anything-free-catalog-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/inject-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/cheat-indetectable-roblox-fantome_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/gear-me-hack-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-how-to-get-free-robux-in-seconds-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robuxe-gratuit-site-de-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-cheat-dll-phantom-forces_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-monedas-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-look-like-a-pro-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-pokemon-go-2_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_off00003024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3024 21636 bytes
SHA-256: 744657f51ac9b7d6824b18e70dfe25002019c6f990c40ff98465abfc12e3d13f
font_01_sfnt_off00005f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 19464 bytes
SHA-256: b4ad347e7df076dcc68efa8f3dfaf57f4e34d9bd5affb0c824cfa038be49be7d

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