Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5ee888c2afa628…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 15:48:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 40a6a18a5ca09bec0b1cf1ee059355cf SHA-1: 52f7cf3a9c72eb0014518441364c4f6ff0b15fed SHA-256: 6b5ee888c2afa628f98d0809843214da703db553e30123727be9b7514db6a4c7
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering a 'free Robux game hack'. This is a common lure used in phishing campaigns to trick users into downloading potentially malicious files or visiting fraudulent sites. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks.

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-free-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_off00002c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1C 26840 bytes
SHA-256: bea1255285896f11a20eb06f502c70cc8342b6d23ef2a1b931622fb5fdf58a82
font_01_sfnt_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 18180 bytes
SHA-256: b892188b0545c7b74f3e706ff7289536b8608c6e24b963a14dda60cd6c46c02c

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