Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8c115b0cec62ee…

MALICIOUS

PDF

47.4 KB Created: 2021-06-04 04:02:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8287b670e8ac6ee408f1be370dbe6675 SHA-1: d83d5efd0f3adb378a3edade73ee975487eb25bb SHA-256: 3b8c115b0cec62ee61bdace9e9ffdeec0a70a6adcda1300ba89531098555a7e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a 'free generator / game hack' lure, indicating a phishing or scam attempt. The document body and heuristics confirm the malicious intent to redirect users to potentially harmful infrastructure. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/how-can-u-get-free-robux-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/all-free-emotes-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/play-roblox-for-free-on-google_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F83 24920 bytes
SHA-256: fb9129620891bbb76ee42beebb9a78f5211efcc91782efe97af959e2972dc4fe
font_01_sfnt_off00008893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8893 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off0000953b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953B 18696 bytes
SHA-256: 6d387a6157482ae5d4424ea2a1b018d5f079fe6dbc45eeb2149446a5bd008250

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