Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3424416f0b0585b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 14:18:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48faa0a7c5c1c781bf3abfdda59ce676 SHA-1: a4e2b52198a39a2a6dfc88c42aebc7529289d92c SHA-256: a3424416f0b0585bc15cf3b150d252b05f2f017448adbd63d2fdc6e3344414cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a 'Pig Master Free Coins and Spins Game Hack'. The heuristic firings indicate this is a known malicious redirector pattern. While no scripts were extracted, the document's content and embedded URLs strongly suggest a phishing or scam lure designed to lead users to potentially harmful websites.

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.tw/app/406889139/pig-master-free-coins-and-spins-game-hack In PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/robuxiancom-freerobuxcodegenerater_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-chat-cheats-on-rocitizens_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-net-hack_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/is-there-a-free-way-to-change-roblox-name_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/cheat-on-roblox-ghost-simulattor_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/roblox-bgs-hacks_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/download-roblox-hack-for-pc_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/hacking-roblox-jalibreak_GM431946152.pdfIn PDF document text
    • https://zarco.co.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B6 22268 bytes
SHA-256: 2efec391ab3d248fc04381391a5f28d3535c97e38c61cef54adabd23eeb02e05
font_01_sfnt_off00006215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 18504 bytes
SHA-256: 4a9856cc4221cd6b4125ca063392c37abdc4543c3603510ef56bcd4a520794b3

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