Malicious PDF — malware analysis report

Static analysis result for SHA-256 3756ea30e3eb06e1…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 23:57:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: af14c2be6e4a25c47112fb0be7ba0fd9 SHA-1: 0a1535fb70431597056ba25ddb74971a1da7f58d SHA-256: 3756ea30e3eb06e10811022d4368a4e03963d644f92cc00cc60c4c6e10122f4b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising game hacks and free currency. The primary link redirects to a known malicious infrastructure, suggesting a phishing or scam campaign. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a social engineering attack aimed at driving traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hack-apk-2021-download-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/cheats-roblox-highschool_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.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_off000033b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B6 23924 bytes
SHA-256: b50fee59c05d5115be745dd09903b8fbdcf35e25ce06eb79be32108d3e8f407e
font_01_sfnt_off000069d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 19160 bytes
SHA-256: 08c3d26020315796c296df9400c9a2a920b0dbbe4ac3986bc7fb3bd2c9b27f96

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