Malicious PDF — malware analysis report

Static analysis result for SHA-256 042a0e27480f7203…

MALICIOUS

PDF

35.2 KB Created: 2021-07-08 01:39:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 484d03170a8891128966e04ee0e099e1 SHA-1: 355f252fcb52eeca8c63d021a527e5d4f9d4ee6d SHA-256: 042a0e27480f7203ea2cf30cc210c10edcc69fe6f4ad7cd4797e93c5a1531feb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game currency and hacks. The primary malicious URL, http://netcdn.tw/app/431946152/free-robux-survey-game-hack, is directly linked to a 'free robux survey game hack' lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or scam attempt, likely leading to further malicious content or malware download.

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-survey-game-hack In PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/how-to-get-free-infinite-robux-in-roblox-imaflynmidget_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/free-gifts-right-now-roblox-offical-fuzion_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/regular-youtube-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/how-to-hack-roblox-mobile-with-ifile_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-coin-master-cards_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_off00002fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC7 23264 bytes
SHA-256: 7240a6c104945b183dcd99ccf3d70e194139211fdaaf1bad7fe30352ac3221d3
font_01_sfnt_off00006474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6474 19012 bytes
SHA-256: c0541a5d6200ab17734b4952abc6c0a8b533a715d99044a6ee13c1a52db76e39

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