Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b12ab508cd00bd…

MALICIOUS

PDF

48.1 KB Created: 2021-06-08 14:28:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b7c553b0c21540c2e5a35937abaea6f8 SHA-1: bfcc4d8e8b205c60f0419b7fd0595b3466f615e3 SHA-256: f3b12ab508cd00bdf0c90395491c4b980fb540a81ea9511e9e3035810198cbe9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with 'game hack' lures. The embedded URLs, such as https://netcdn.tw/app/431946152/conseguir-robux-gratis-hack-game-hack, are known to lead to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/conseguir-robux-gratis-hack-game-hack In PDF document text
    • http://moskewicz.com/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/coins-master_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/hacker-texting-simulator-simulator-roblox-code_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://moskewicz.com/images/free-robux-no-verification-or-offers_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/pokemon-go-free-accounts-2021_GM1094591345.pdfIn PDF document text
    • http://moskewicz.com/images/download-hacked-games-roblox_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-free-spin-link-today-2021_GM406889139.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_off00005217.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5217 25572 bytes
SHA-256: cbc849208d28266362c068b56631324c57f032239bf4a52217b234d56e2930a6
font_01_sfnt_off00008dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDE 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00009799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9799 18760 bytes
SHA-256: 56cde107cdb6739847cf3d6e0885e0149d082d1113ad569c1ea5d04ae473c7e0

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