Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3ae029e9c94d7d…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 08:26:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aea606e44f4e4838de54543edfd0d91c SHA-1: 0a1e582eb183fc43f202b0623111bfdafb516a18 SHA-256: 3e3ae029e9c94d7d0ba2f4cafd61b7b09c18ac3de7839b7f676381c96a07f392
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and currency generators. The primary lure URL is http://netcdn.tw/app/406889139/free-coin-master-cards-link-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

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-coin-master-cards-link-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/a-lot-of-robux_GM431946152.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/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-short-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-drawing-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-cheat-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3013 22024 bytes
SHA-256: 6406a36b4dbf5a7e4ac173a50585505c08455faaf1ff43490d7cddb43bcd2a6c
font_01_sfnt_off000060f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 18340 bytes
SHA-256: b2017717319ed1cc4a90f63cde4a7ca53e868056cc2e1441a2f5bc7eaddf4cbd

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