Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dafbec085c40975…

MALICIOUS

PDF

35.7 KB Created: 2021-07-19 20:46:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 14bdd6497b56bd3f992306f15710b72b SHA-1: dc7917984fc7f4c10a0a5b6d4f07be85a52d5c3c SHA-256: 6dafbec085c409754faca291d79142eb959f3b5f38138c34ce2fb8067ebce284
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/lazyblox-com-free-robux-game-hack, which is presented as a 'free generator / game hack'. The document body also contains a call-to-action to access a 'ROBUX GENERATOR'. This indicates a lure for users to click malicious links, likely leading to further exploitation or credential harvesting.

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 http://netcdn.tw/app/431946152/lazyblox-com-free-robux-game-hack In PDF document text
    • https://diatecgroup.com/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://diatecgroup.com/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://diatecgroup.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://diatecgroup.com/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://diatecgroup.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://diatecgroup.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://diatecgroup.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://diatecgroup.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://diatecgroup.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://diatecgroup.com/images/coin-master-free-soins_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
font_00_sfnt_off00003412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3412 22884 bytes
SHA-256: 1468229fb0385430fb0835f955aa4103333bebc6aab625e831c9bc5d20260261
font_01_sfnt_off00006780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 19024 bytes
SHA-256: 526782f1ff70328694fc7e00be18e0e67c0f7dc586f16fbbfcee2cda038cc934