Malicious PDF — malware analysis report

Static analysis result for SHA-256 d605ca4822e9cf83…

MALICIOUS

PDF

43.9 KB Created: 2021-05-16 11:07:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8bf9ff57c42d2c6109070abcdf007b86 SHA-1: 6ad477f8d6ce5356f84e4dbb85ba95f1d916706c SHA-256: d605ca4822e9cf83c508818f6c9218b73551c1e3b791ef4ea7dc90812b188208
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to free game currency and download buttons, directing users to a known malicious redirector. The primary malicious link identified is https://netcdn.xyz/app/431946152/robux-free-2021-game-hack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit users through social engineering and redirect them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/431946152/robux-free-2021-game-hack In PDF document text
    • https://photographygroupofbunbury.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/mc-hacks_GM479516143.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-hack-twitter_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4C 24296 bytes
SHA-256: 3d175f749af06fa0e86b55935421cf5298d13d825976f08723223ce1a4a66470
font_01_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 20196 bytes
SHA-256: a4a81b32dc7c17fa10e593f31fd62eeb9dc8b73937f6ae8c739758766076b7b4

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