Malicious PDF — malware analysis report

Static analysis result for SHA-256 4689b805fd62d751…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 10:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5038fe9a3a4fec6b1c47aac7bb5da940 SHA-1: 9f596420d9ba9e764dcdfc098cd8166daeb2d40c SHA-256: 4689b805fd62d751482b65dffb09edd1fe444310ce3c28c85d141163511ad8dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-with-no-human-verification-game-hack. The document body and heuristics indicate a lure for free game currency or hacks, likely leading to further malicious content or malware. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or social engineering attack.

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/431946152/free-robux-with-no-human-verification-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-animation-free-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-free-level-7-script-executor_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-client-pc_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pin-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-wall-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/beach-house-roleplay-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-human-verification-2021-no-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-i-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-stats-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/android-coin-master-hack_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_off00002f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9B 21920 bytes
SHA-256: 6988e3fa443de47f23956fa92186032dad160ddbd8e2d27c999ba597af5a4cbe
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 19700 bytes
SHA-256: 35e501b9c45e5927f0fc62a5ada2d4fbbc4f1128da3636f490de4bd32383e5b5

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