Malicious PDF — malware analysis report

Static analysis result for SHA-256 782dcb7a6a3d66f4…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 13:56:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 15ecb7e631564f410e0bf2250102af69 SHA-1: 59f5d88b902dd095d58e1a3c24e86118ae211aa5 SHA-256: 782dcb7a6a3d66f4d5599c099256b8403c8e1e1893ddd57e9bc8905636abe781
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spins-and-coins-on-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://perpus.unik-kediri.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/hack-bloxtube-beta-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/robux-page_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off0000513a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513A 24216 bytes
SHA-256: 5442095e5a70929e7b0f15424792373e0921d49dd03478fa71be26c77729170b
font_01_sfnt_off000088b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 18060 bytes
SHA-256: 64690fddacb88a1b87eb78a3bf181b542b813998c8d2539429c7660090ba79fa

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