Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f539726b70f4ad1…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 00:50:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 48d726a705b503d94df302dc6951cd17 SHA-1: d7d1a9904c63070f574158320ce99af470236e50 SHA-256: 9f539726b70f4ad16c6beed45f22e856bc1793ae05038e916dd48d16ed48998c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-new-cards-hack-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting potentially harmful sites.

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-master-new-cards-hack-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/can-you-make-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/pokemon-go-free-60fps_GM1094591345.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-accounts-2021-rich_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/play-free-roblox-war-games_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-robux-easy-with-a-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-2021-accounts_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-without-verification-or-survey_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_off00002ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECB 22524 bytes
SHA-256: 914c68d3abe3ca9f2ad455538216d37008e694d85d9257749a471ac016389eca
font_01_sfnt_off000060d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 18340 bytes
SHA-256: 04553dd5ea49aec812c3aedd75e16826e182235ed5db1120239bebcc2b38d336

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