Malicious PDF — malware analysis report

Static analysis result for SHA-256 a387ac237af5b315…

MALICIOUS

PDF

41.3 KB Created: 2021-05-12 15:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a20b3367e3934090f642cb91e1f37780 SHA-1: 0e7374a2920eb9931ccaad1d052ecc10a682a63e SHA-256: a387ac237af5b3157595e93a8c0c9434f4e98fa8ca67e5385414bd3481daa569
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure URL is https://netcdn.xyz/app/431946152/roblox-cp-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lead users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/roblox-cp-game-hack In PDF document text
    • https://jsgwertherborgholzhausen.de/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://jsgwertherborgholzhausen.de/images/how-to-make-a-minecraft-pe-server-for-free_GM479516143.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
font_00_sfnt_off0000495a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x495A 24092 bytes
SHA-256: 1adafb4bb3e52dc558511466130eb70a85067707cf6e07e96966c4e1aec1a957
font_01_sfnt_off00007fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FED 17960 bytes
SHA-256: b4362ed69c91c8c7fb582cd3eb5794631eee1aca0fc0b19393ebd2862daffc5c

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