Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ae6d47cad2f2f3…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 10:43:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 80e17e02218cc3b1f4395edaf1676233 SHA-1: 36d1b59aef9b53869fa8b5d0c324b8fe98de3e70 SHA-256: c7ae6d47cad2f2f32a579a0568d9db9c706e6f4acef105933a9ad0b52d7447d6
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.tw/app/431946152/how-to-get-free-wings-in-roblox-2021-game-hack`. The document body and heuristics indicate a lure for game hacks and free items, suggesting a phishing or malware distribution attempt. The presence of numerous links to other PDFs hosted on `library.stieyapan.ac.id` further supports a link farm or content aggregation strategy for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/how-to-get-free-wings-in-roblox-2021-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-iraq_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.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
stream_004_off000052a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A7 26304 bytes
SHA-256: 63eb0e60fddf8b804210df6df2f2fec3948b4c22ce1f71f202533e886ebaf1f8
font_01_sfnt_off00009064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9064 19224 bytes
SHA-256: d85700aa8aa25bb8e2dec4809f896a69a049b931100213f8b347c5c3a7fa7da3

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