Malicious PDF — malware analysis report

Static analysis result for SHA-256 1331875fbc201f4d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 13:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 26ff4b9e7cec74569f0c676aacb56c7b SHA-1: dada88641663bbdcc9d45461c379f1a3cc1a86a2 SHA-256: 1331875fbc201f4db288517fc60656de7b7cfcdce531406ba7fd7ec84ff9ba7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that lead to a known malicious redirector, specifically advertising 'free generator / game hack' lures. The ML classifier also flagged this PDF with high confidence. The document body and heuristics indicate a social engineering tactic to trick users into visiting malicious sites, likely for further exploitation or malware delivery.

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.tw/app/406889139/spin-coin-master-free-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-laser-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-chrome-extension-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hjow-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-adopt-me-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fe1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE1 22616 bytes
SHA-256: 11ec9b582d10111e9503c2de4322ad1153da1ecbf1c80d40c5ba3609d32be243
font_01_sfnt_off0000626f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 18176 bytes
SHA-256: 1096432c91a33187bc9c09511f00b7fa0c2395c0afe101c31e464ccb2ed8743e

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