Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9342b2b8d5016e…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 13:42:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 004270124e8fcf0979982ad823e756ef SHA-1: 609f8026ffa5ff77b06776be43844445117ec120 SHA-256: 2e9342b2b8d5016e90ec9d5efb16e33ecb660b6e33059ad3d15dc46f665bfc5e
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as 'free generators' or 'game hacks' for popular games, directing users to potentially malicious redirectors and SEO link farms. The document body and heuristics indicate a lure for free in-game items, likely to trick users into downloading malware or visiting phishing sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/479516143/minecraft-xbox-one-free-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/new-roblox-retail-tycoon-hack-exploit_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-112-2-hacked-client_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_off00002ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDF 21812 bytes
SHA-256: 124e3ffa770ef08827f8d29be067df0926b28b216c4eee71c64c03f24e1425c6
font_01_sfnt_off00005df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF8 18596 bytes
SHA-256: c69a321adb9ca2feca3cc6c2d46b75a266afbd9d9bd8cb9495fe0dd6a50089d0

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