Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2cd74deed3da91…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 05:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 92bade099ec55ecbf051b6e49ed3cbcd SHA-1: 6c325c87a1be4d3befc725747579ad59b3f05380 SHA-256: 5b2cd74deed3da91eeac94161c28a9b7eda1227c1a5976252ea48e978cdac80c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier and specific PDF heuristics strongly indicate malicious intent. While no scripts were extracted, the embedded URLs and the nature of the lure suggest the document is designed to lead the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-pizza-game-hacks-game-hack In PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hack-script-mad-city_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-do-you-earn-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
stream_004_off0000515d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515D 25112 bytes
SHA-256: 6be6e15ebeda64399974b8188753150e75eb74f2af6417faf9b87ce34d7d894b
font_01_sfnt_off00008b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8F 18800 bytes
SHA-256: ded09e2a4527943f4899b975de9cbfb88fc75b0e52eaeb7b44103b018d404a56

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