Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3fd77b717e8e7a…

MALICIOUS

PDF

34.7 KB Created: 2021-05-22 06:07:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 484e5d2a869c1cd2d3d4b6506e502316 SHA-1: 2eecb42c4b402442bc6e144c62dc5b665bdcea4c SHA-256: 9f3fd77b717e8e7a3a8975d1d8580f09b8bc84b7215a347f9eb9e03222dbeff3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'hacking Roblox for Robux' and includes a prominent call-to-action button. It embeds a link to a known malicious redirector, which is designed to lead users to potentially harmful websites. The document body and heuristics indicate a social engineering tactic to entice users into clicking the malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-hack-roblox-for-robux-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
font_00_sfnt_off00002bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCC 24832 bytes
SHA-256: 765132a2def6214dea7ff0d53014b7a96a4e227f46ee2a5b2f17dad1ccd4ffef
font_01_sfnt_off00006540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6540 18648 bytes
SHA-256: 7689b6731d47fc176aef925fc5194a10a34d162e90d7014a3ccea13949bcaf7e

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