Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab96d2a8c331e641…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 04:50:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 193e9f14869df7050f1ce116edecdced SHA-1: b1d37a962857fb476a6d45cd133b2d51decfc392 SHA-256: ab96d2a8c331e64145d4492462a2510eb45336a21048227acdde5a8a21d9f3a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/hack-money-roblox-cheat-engine-game-hack. This URL is presented as a 'free generator' or 'game hack', indicating a social engineering lure to trick users into downloading or visiting a malicious site. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/hack-money-roblox-cheat-engine-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-robux-for-free-that-actually-works_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-know-if-your-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-eith-no-verifications_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-all-games-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/best-free-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/hack-jailbreak-roblox-2021-kranberrye_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-hacker-skin_GM479516143.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_off000030fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA 22812 bytes
SHA-256: d6d98c722677c1106672570d6fba8ca6ee92060b28131962f3d324d3505a6f20
font_01_sfnt_off000063ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 19420 bytes
SHA-256: 05c70935c5bf2ebea47d734f6649a56444f76cf2d9d570979ffe7982c322f2b2