Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5466424be4023f…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 06:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5df3eae5a860a24a954385543aa4568d SHA-1: c76197eaec08443e75085cc9a6a728146faeb38a SHA-256: bb5466424be4023f1bed2f4dbc82b7c5f3cff8d0cf4aac13714cec36561686f8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users with promises of game hacks and free in-game currency, directing them to the URL http://netcdn.tw/app/431946152/free-roblox-intros-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content or download further malware. The ML classifier also flagged this PDF with high confidence.

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/free-roblox-intros-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-for-pressing-the-button_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-stands-online-cheat_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/dragon-ball-z-roblox-training-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-draw-roblox-anime_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-free-robux-code-generator_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.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/hexus-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/earn-robux-today-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-come_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-hack-2021-real-no-human-vertification_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/pubg-uc-vpn-apk_GM1330123889.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-pfficial_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-daily-free-spins-link-today-twitter_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_off00003435.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3435 23120 bytes
SHA-256: 8577471ac3bb6aa0f690cab173a86871f934f6159305176bf54dbc2161a84ca8
font_01_sfnt_off0000685f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685F 18752 bytes
SHA-256: 6bf376b09816765e402d515af924a62be3fa0c3e098cc2a2b1f733bb65ab6f85

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