Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27e6608fd4f0ee2…

MALICIOUS

PDF

38.8 KB Created: 2021-05-19 06:02:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7cebe85cbe55e5ea397316d30d37d7a0 SHA-1: a2bb3e59e5271ebcb16d26ea4e2922e911c3ccf9 SHA-256: a27e6608fd4f0ee2e329529a27de938100ae460b1c915493e23f146d652d51d3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux' and a call to action, directing users to a known malicious redirector URL. This indicates a phishing attempt designed to lead users to potentially harmful content or further malware. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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-human-verification-generator-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_off00003306.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3306 29148 bytes
SHA-256: 52f63a46500ff94ac4a7cb9084dc450caa24db4590cb61e427ad77f6052a666a
font_01_sfnt_off000074cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 18860 bytes
SHA-256: d7f1bf4664d5c073c741d68610eb5dcf28a8fd63084b2bf56aee4ef09f8af4a0

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