Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7d469f439b98bb…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 07:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 513620e4324d2740ede685ffa4ccea37 SHA-1: 8f1fab7e480c4ac12b071de19e5f343babdf9ea3 SHA-256: 7f7d469f439b98bbed32cb43e3a321bd0345c6c5a0c13f79a8662322443932b6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The document body, though heavily obfuscated, contains references to 'Roblox Trolling' and URLs associated with such lures. The presence of these links strongly suggests an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/roblox-trolling-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000520c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520C 25300 bytes
SHA-256: 3957fd51eef6a03fee9d6f3f7d5acf06f8c528382b93c7139f969117dec97d76
font_01_sfnt_off00008cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC2 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000096ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AD 18192 bytes
SHA-256: 71604384ebc4a394942ac25074e396c0ebb11f2a88b51d5532127cac238e2fd8

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