Malicious PDF — malware analysis report

Static analysis result for SHA-256 831a41a1b5701e9b…

MALICIOUS

PDF

46.5 KB Created: 2021-05-19 01:26:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8d0b97acceec8dae9a3d158e662494e SHA-1: 0b369b503325e99c22584918a759c81f1b2e5eba SHA-256: 831a41a1b5701e9b047bcbf8627973a6fc6e321cc18df95e9989c5c3bf99fd02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for free game hacks and currency, directing users to a known malicious redirector. The embedded URL, https://netcdn.xyz/app/1094591345/how-to-get-pokecoins-in-pokemon-go-free-game-hack, is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/1094591345/how-to-get-pokecoins-in-pokemon-go-free-game-hack In PDF document text
    • http://immo360grad.com/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5B 26780 bytes
SHA-256: afbae2a5a73a4db7c41103c1af8defcc3c28868f746613d69bb889bf7ab28cc5
font_01_sfnt_off00008789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8789 3436 bytes
SHA-256: 97acb3dfe99d8aca5d6f8db8393b488ed98b2263432579da10c481344d87daf1
font_02_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 18228 bytes
SHA-256: 0947a0e9a39205029ae28cf6b343da855b33df67e5f97004a5aae5e6bb097149

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