Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4d2871cd98931b…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 15:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 053ae66477b1b6b38de6a027b6246cd4 SHA-1: f128b544ab13a89638e9c2692c42831e283ef9be SHA-256: 6b4d2871cd98931be082082f3c07324167ffc8173b927c53bb7159a2836eb9e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and hacks to trick users into clicking malicious links. The document contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure, which likely leads to further malicious content or malware downloads. The ML classifier also strongly indicated maliciousness.

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/roblox-clothing-free-edit-avatar-game-hack In PDF document text
    • http://perpustakaanlia.net/katalog/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/2021-headphones-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/bubbatron11-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-protosmasher-whitelist-key-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-nike-shirt-template-free-shipping_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-hack-android-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-free-robux-youtube-aidentm_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-robux-hack-online-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/10-free-roblox-gears_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/best-free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-free-robux-with-inspect-console_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/does-free-r-here-in-roblox-actually-work_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-cheat-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-client-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00003096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3096 22988 bytes
SHA-256: e9f5c62bf9689fd0623d0929e2e9d3690adca33ef503ed9a84fcd8ecad626803
font_01_sfnt_off000063f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 19328 bytes
SHA-256: 42b930233a713fbbcb26545a96524e481ad7fb3c6c4aa6d9c8b3eaa9df74ca74

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