Malicious PDF — malware analysis report

Static analysis result for SHA-256 160e3f54f27cf530…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 22:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 99a9191b2ccc2a1e31d1fdcfb4467781 SHA-1: 7a2321bf047bfc1616b38a8ada8ed9d457cf5d14 SHA-256: 160e3f54f27cf5304a93bd35fbddc37b90c0b8349860435b3ae4e4e4fa7358cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-robux-hack-download-2021-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free Robux or game hacks. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves social engineering to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-hack-download-2021-game-hack In PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-com_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
font_00_sfnt_off00002e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E43 22088 bytes
SHA-256: 365426877d68c9c301b209775e29e4ad9c990d6c0fb004d4d5a9049817741033
font_01_sfnt_off00005f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F07 19868 bytes
SHA-256: 33d1980f23f2f31c0d3eff3026bbb89e460d419ff0aa5d39e4b41c649d27dfcc