Malicious PDF — malware analysis report

Static analysis result for SHA-256 262f26dab602b994…

MALICIOUS

PDF

36.1 KB Created: 2021-05-16 10:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3f0dd6706632f63a006b937c36dfe594 SHA-1: cc3a22b3a0d3cda2ce02ffbf7f44ebffc18d558d SHA-256: 262f26dab602b9947dbcc7b39080236dcc5b819abafa1ea15035bc8d194c3d08
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL, disguised as a 'free Robux' generator and game hack. This lure, combined with a call-to-action button, strongly suggests a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious workflow designed to entice users to click through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

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-easy-and-fast-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_off000032b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B9 24536 bytes
SHA-256: 6179d4f1dd16e1265758a0c666289fb68ad309c6737787e8b28d924d7368a89a
font_01_sfnt_off00006a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 18700 bytes
SHA-256: cd82fd057618e61f88de5dcbfbdf8dcaa9884b2739de6fa529a9953be94575dd

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