Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d26cd494306d71…

MALICIOUS

PDF

50.0 KB Created: 2021-06-04 00:52:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0621ed292e1cbe9248564444d7a9669f SHA-1: 607770b84bf28a1b2136253721ba5fa1951b0a30 SHA-256: 30d26cd494306d7141002c88134dbbd787d485e942755632f04818abb46ce8e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games like Roblox. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to potentially harmful websites, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.online/app/431946152/roblox-comroblox-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-coins-and-spins-app_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
stream_004_off0000515a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515A 36244 bytes
SHA-256: 571225926baff6650e0f2435adaf35e40b3da7edbf50ba08b1bc53715907a70c
font_01_sfnt_off0000a200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA200 18044 bytes
SHA-256: 902379b3d073e691e23237abb92ed0f3af9f7c2e96674f4b88e40d5aba0067d4

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