Malicious PDF — malware analysis report

Static analysis result for SHA-256 a051ca53cacdccc0…

MALICIOUS

PDF

38.3 KB Created: 2021-05-12 02:35:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6bdf89b8ad621b36d15337df59ea7761 SHA-1: 81b6603ad2630e9411abf06af76aba6dcc84754c SHA-256: a051ca53cacdccc0aba8b04fc2e02dbdb3e62e9441db108989cc4317c0f7aa58
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'dailyrobux-game-hack' URL. This URL is identified as malicious infrastructure. The document body also contains text related to 'Dailyrobux' and a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, reinforcing the lure. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/dailyrobux-game-hack In 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
stream_003_off0000328e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328E 27800 bytes
SHA-256: ac7f12b28af2aefb052b3a0dd8d968afc5aa1693b769b40b81968916873357a7
font_01_sfnt_off00007387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 18620 bytes
SHA-256: 006376ad9c7b73d4fd15d3b6dd3ffa9064f0af8ff6d6cdc29d45d1e9c8c3f0f5

Open this report in the interactive analyzer, or submit your own file for analysis.