Malicious PDF — malware analysis report

Static analysis result for SHA-256 389d8ffebb6068a3…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 07:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: baf1ea1f428519608adadcfec8ed881c SHA-1: 0a90b4cb769b7c9bf53ef53349facab24bb330cf SHA-256: 389d8ffebb6068a3bb22f88f4aad65196bc151c95424dbf35c7ed68673349d46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generators" or "game hacks". The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-free-igg-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/roblox-free-igg-game-hack In PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/tiktok-free-steam-games_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-and-coins-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FAB 25088 bytes
SHA-256: d6029c536f4813a57478418dc46a9cf2fdc561b98a5004139b1a1af623fad8ce
font_01_sfnt_off00008907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8907 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off000092b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B4 18236 bytes
SHA-256: 8bc266245f35cafdccfd09fe823a61764ffce6ea27996723344772d6fadaf798

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