Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfff2a0103d68616…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 13:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b864e38459f04b243a2371a1712225c2 SHA-1: dd0b8523069eefa60c2af1eccd6323a4031b9a94 SHA-256: dfff2a0103d68616061590cd9c65a80fe6bdfb5774b02f9c57ffbc0f57777809
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for a 'free generator / game hack' which redirects to known malicious infrastructure. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious redirector chain designed to lead users to malicious content.

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/coin-mast-hacks-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-foryoupage_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-get-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-fashion-frenzy-games-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/are-there-and-free-safe-roblox-exploits-v3rmillion_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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22712 bytes
SHA-256: 52073aaba219f8c8495f487b8fd705e1dac7865f027edda65d7d10d8b49c0294
font_01_sfnt_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 18004 bytes
SHA-256: 9d95a6a02b99d49185e57d1486a892a1617eeb29a1263c5cbf44862ce121196b

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