Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa71d04c23f9f2ea…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 04:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 81576e1473e10a82915e146fa51e5c8a SHA-1: 36e0f0561fd3dda4893ac4053f1897a963c4c259 SHA-256: aa71d04c23f9f2ea0ceff91049946be99042aa049218fa6d06be4fed6d145f86
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically luring users with 'game hack' and 'robux' related content. The document body and embedded URLs point to a known malicious redirector infrastructure. The primary goal appears to be directing the user to a malicious site that likely hosts a secondary payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/olais-only-robux-hack-game-hack In PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/shinobi-life-level-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-robux-for-free-without-cheating-or-hacking_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/cheats-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-roblox-money-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-bad-business-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/cheats-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-pet-dog-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/fly-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-and-tix-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-cheat-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-stuff-on-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-zone-free-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 21780 bytes
SHA-256: 28e55b045d193dcf8d059e37df0ac337e9d319a64d99bc2beeef6a8257f979db
font_01_sfnt_off000060eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 19096 bytes
SHA-256: 9ae74bcc954ffe79a0a530ba9cb078f02f76c4a165dfb44e70b0fead9c0a2184

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