Malicious PDF — malware analysis report

Static analysis result for SHA-256 adeb1e67ba57c6ca…

MALICIOUS

PDF

33.2 KB Created: 2021-07-19 17:10:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7f9b86695540c4fb7d0f3b6885bc6380 SHA-1: ecf8ad55fe7d0fe40e3cf9fc398517e08e580071 SHA-256: adeb1e67ba57c6ca0d3b99a177485d7fc7cf6f9a5c843c488d52cd217f3ddf9d
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'free Robux generator' or 'game hack'. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the use of redirector infrastructure. The document's content and embedded links are designed to trick users into visiting potentially harmful sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/blox-land-free-robux-game-hack In PDF document text
    • http://www.homesweethome.pl/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-free-trial_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_off00002bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCE 22560 bytes
SHA-256: f18f6ca754c959772bdcf2bdd1e8091684c7a9a9dfbef468fd2a7e2ab4f250a5
font_01_sfnt_off00005e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 18676 bytes
SHA-256: a7c13821684fc61eaa049fd43eee10516df39e364fb7cd2fb838e5b14a979614