Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67158b0bdf4c15d…

MALICIOUS

PDF

37.4 KB Created: 2021-05-16 22:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3a8cb2fad40f8394df2b7ed4a6e7a6a0 SHA-1: aa6b82e78b3c6141b2fdbc5f775f1edfb8d7fcac SHA-256: e67158b0bdf4c15d1d22575e57097550662d61fa7690c977e5613d71e05bc48b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body explicitly mentions 'Free Robux No Verification Or Survey' and includes a call to action to access a 'ROBLOX GENERATOR'. This indicates a phishing or scam attempt to trick users into visiting a malicious 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-no-verification-or-survey-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_off00003208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3208 26636 bytes
SHA-256: 2dbb9161d9d0b712aef226e45c5591b1807abd55d6e7be04a7b5bd96cfa3686e
font_01_sfnt_off00006f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 18892 bytes
SHA-256: 85e8471d4bb7809b16494b43ecc998cec7f87bafeaec38a3001510264e72f0e6