Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62f0e52f697811e…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 22:08:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7cc2ab6f4e3313c291d6bafd98b6e5b0 SHA-1: 542291eafc60bcef752bd629a40c26d80d992d6a SHA-256: e62f0e52f697811e3039454ac58d810e291633d88945d517c911a50cb8304610
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary malicious URL identified is https://netcdn.online/app/431946152/how-to-get-free-robux-inspect-game-hack, which is likely used to download a second-stage payload. The document body and embedded URLs reinforce the lure of obtaining free in-game currency or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-to-get-free-robux-inspect-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-4all-cool-20219-uc_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-kart_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-net-download-free_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
stream_004_off00005170.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5170 29092 bytes
SHA-256: d306c9e596aa3c3ef06faf6bf48981db63c6bc57a3ca6fc693c99043c4a9a216
font_01_sfnt_off0000939b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939B 18460 bytes
SHA-256: 22a12ce8296f83c6fe51ec3cff30028b7ec5cf0a22e0606da6e2b470e25d3737

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