Malicious PDF — malware analysis report

Static analysis result for SHA-256 929c15a368531226…

MALICIOUS

PDF

33.1 KB Created: 2021-07-07 17:36:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4689ab5eafd2dc583c09666970444f5f SHA-1: 51131100a5de08300a9b8611344151f17a16fb4f SHA-256: 929c15a368531226485ecc91d0cad8d98764007886fa6886587fc4be809d139c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/gmail-roblox-hack-game-hack. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/gmail-roblox-hack-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-gamepasses-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-jailbreak-free-keycard_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-working-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-no-hack-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/games-on-roblox-that-allow-free-song-id_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/comandos-hack-para-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/cs-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-auto-rob-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/is-it-actually-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hack-roblox-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/is-there-a-free-way-to-earn-robux_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_off000029cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29CB 22972 bytes
SHA-256: 3300c2c8bb738fdb8a3891b8ff026a534405b0a5f42982cf47a916cd5c19b246
font_01_sfnt_off00005d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D50 18848 bytes
SHA-256: c9a9c7b62a252cc6b0c23d3cb7b5463f22d1a09c23333439556a1006c4fb4f83