Malicious PDF — malware analysis report

Static analysis result for SHA-256 a894464f543b9784…

MALICIOUS

PDF

54.5 KB Created: 2021-06-03 14:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f3a88b45ae89d877c539d59871e75a9f SHA-1: 06786a307695638d88085db34f944fe7173e8f5a SHA-256: a894464f543b97841e921e7668f240c6e9e7f5c4124b8093bf8f39c25a37f350
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game hacks and currency, directing users to a known malicious redirector. The document body contains obfuscated text and multiple URLs, including the primary malicious link. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

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/free-roblox-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/pubg-300-uc-free_GM1330123889.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/pubg-uc-wallpaper_GM1330123889.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-generator_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_off000052d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D6 30020 bytes
SHA-256: d89317121b55a203bd33f09bd7971520754f700ea831ff2f7fa4435bf1fcfe82
font_01_sfnt_off000098c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C9 8132 bytes
SHA-256: 7b13f62dd83f6e5b39d850f66139f44fff841e4e695f86fdfbe4d5a2de470bf2
font_02_sfnt_off0000b3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B9 17948 bytes
SHA-256: abd46f863f925739c6779ba87e0350ce04166d926cbd983fd5dc50e2b294e41e

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