Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57fe71b80a3d3dc…

MALICIOUS

PDF

37.8 KB Created: 2021-05-11 14:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 83c297a236050f61e96279b25ab92df8 SHA-1: 4f15764ccb3bd4522f742d56f8d835865c937fb6 SHA-256: d57fe71b80a3d3dc7fb04a08bd0031471e9a148fc063721b9a2cf19564e47a37
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic indicating it links to a malicious redirector disguised as a 'free Robux generator' or 'game hack'. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-generator-no-human-verification-2021-game-hack, is associated with malicious activity. The document body also contains text and links related to this lure, suggesting an attempt to trick users into visiting a potentially harmful site.

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/free-robux-generator-no-human-verification-2021-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_off00003469.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3469 26364 bytes
SHA-256: 48025512deb2f1001672e6278346568014d5311508eadd8c6b20d4c7855cc298
font_01_sfnt_off00006f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 19260 bytes
SHA-256: cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4

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