Malicious PDF — malware analysis report

Static analysis result for SHA-256 144cb3466b408899…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 10:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: abc8a5c436168e61bc83f698451392d4 SHA-1: 0d250e02d5f35be1628dcd411d707837c1abac1f SHA-256: 144cb3466b408899bf99cfd8a05dcbbd9dad315a9c55276eb4db1938876e5c9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure associated with game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure of free game items suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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/479516143/minecraft-hacked-client-bedrock-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-dev-to-hire_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-ninja-assassin-hack-script_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/dragon-ball-ultimate-roblox-max-stats-hack-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-egghunt-2021-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-robux-no-password-fo_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/ro-ghoul-script_GM431946152.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_off000031ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AB 21996 bytes
SHA-256: 94eb47c46d2fce1d42901c5902a7b1abb651ec7c523a043e4a9c1d5772537d4a
font_01_sfnt_off000061ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EA 18632 bytes
SHA-256: ea19cabcc1d2008459171cfa1ac99f4fb07a41c27f77d31ac11aa1b8cd153315

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