Malicious PDF — malware analysis report

Static analysis result for SHA-256 482048ecabe72160…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 05:46:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ba9767e683a9f5bb1ffe26b27a900bc3 SHA-1: d1d526a73c9c84c72c5c30b4d98c5d6461d2d56e SHA-256: 482048ecabe721605ea98f7ecb7adec24d52df9b879a2bf0c13077a2fec7cfab
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 'free spins'. The document body and heuristics indicate a lure to a redirector at http://netcdn.tw/app/406889139/claim-free-spins-coin-master-game-hack. While no scripts were extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to drive users to potentially malicious sites, likely for credential harvesting or further malware delivery.

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/claim-free-spins-coin-master-game-hack In PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-hack-that-easy-and-o_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/good-outfits-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-money-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-scipt-loader-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-hack-ios-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-spin-coin-master-2021_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
font_00_sfnt_off000031e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E1 23292 bytes
SHA-256: 6296cf3111cefa87ad64ceb5b65e81accf1b8ddb32d2411538f69a96b955eece
font_01_sfnt_off000065b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B6 18508 bytes
SHA-256: 66edbbd631945b07c06d9fd06a14c74e41c138e401aa3f28fe2d50c5e2faa941

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