Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30d88d4cae34d0c…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 11:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5712c7f95bd0c275d26376b8970ea771 SHA-1: 6d2407de64a46e968e1807ffa62c25e960be3d29 SHA-256: e30d88d4cae34d0c34277efa99dbdb028502adf9bc0a245d11eed91fdaa36fd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures for popular games. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/free-spins-coin-master-android-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-payment-exe-free-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-any-item-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-jailbreak-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-phantom-forces-flame-cheat_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hacking-is-bad-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/i-have-been-hacked-on-roblox_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_off00003550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3550 22664 bytes
SHA-256: 6e20c70fbeecfc79683f01fffadf6589384f9a9b95901faa708ca6d0ba132bd6
font_01_sfnt_off00006805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 18348 bytes
SHA-256: 5f09792028422a0f3da80369e6b79e1943eb381c954ddc120ae65d5118bfcfa1

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