Malicious PDF — malware analysis report

Static analysis result for SHA-256 0422ff5769758022…

MALICIOUS

PDF

40.8 KB Created: 2021-04-25 00:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 861541063d9a80a2c7b84332d9a5f910 SHA-1: 201a513f859abe06df3de6aa846df298d8222332 SHA-256: 0422ff57697580225005b6023eecd321b17e546d91d8a668e5478da1f4eca500
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free generators and game hacks for Roblox. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-wings-fo-free-roblox-game-hack, which is designed to trick users into clicking through to a potentially harmful destination. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to exploit user interest in gaming for malicious purposes, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/how-to-get-wings-fo-free-roblox-game-hack In PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-get-roblox-clothes-for-free-2021.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-roblox-builders-club-code-generator.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-do-i-hack-someones-roblox-acc.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-hack-apocalypse-rising-on-roblox.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-download-roblox-robux-hack.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-hacked-accounts-for-roblox.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hack-para-zombie-rush-roblox.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hacks-for-exq-tops-roblox.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-use-a-script-hack-roblox-game.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-change-you-name-in-roblox-hack.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_off0000422a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x422A 25024 bytes
SHA-256: 0fe06a36ce52380078302f95d977359e81b993dfb8b1968ba4c495b8f376b1a9
font_01_sfnt_off00007c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C12 18824 bytes
SHA-256: d19c9170e9ddcda5f94c6e4b7541d708f7cc444193c293fc8c96be9281084b9d

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