Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd387937593a2894…

MALICIOUS

PDF

50.0 KB Created: 2021-06-10 22:16:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e43167522e252af41491496f2c46ce88 SHA-1: 09905e41af1fbca1193f8b73a2f5fa61d47a6b0f SHA-256: fd387937593a28949395d3f5a48bf413ef3b174871261c678c566c488aa871a1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free game currency and hacks, impersonating the Amazon brand to trick users into clicking a link. The link redirects to a malicious website, likely to host a second-stage payload or phishing page. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to exploit user interest in gaming rewards.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/a-website-to-get-free-robux-game-hack.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/a-website-to-get-free-robux-game-hack PDF link annotation
    • http://www.compusiteinc.com/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/pubg-uc-unlimited-free_GM1330123889.pdfIn PDF document text
    • http://www.compusiteinc.com/images/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-project-jojo-hack_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-do-you-get-free-robux-on-survey_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-free-draw_GM431946152.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5E 26264 bytes
SHA-256: c2843b2478f3ae6dd30023108b55883c06ac4e465fdc9032f5e9bd69a0c72045
font_01_sfnt_off0000894c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894C 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00009309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB1 18436 bytes
SHA-256: 13acf63678a78f566003415df56a0bb5eb759be625952cbdeb2e57c1c30e4bbc

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