Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e386dc54e0d8580…

MALICIOUS

PDF

35.2 KB Created: 2021-05-22 04:16:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eac63d962ad6899e0ea0aa912a4474aa SHA-1: 9966c6c5b199ddca255c75226ee1549a9cb18d45 SHA-256: 8e386dc54e0d85808e24c7834a87cbc17b0e32ccf8fee825871168115e4216f4
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "free generator / game hack" for TikTok. The document body and heuristics indicate a lure designed to entice users to click these malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/835599320/how-to-get-verified-on-tiktok-for-free-2021-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_002_off00002b8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B8F 26844 bytes
SHA-256: 7ad56f1b1a58b7df7d2e5dd87fa41cc9c634a5ea2dce1f147075af76aa2cf616
font_01_sfnt_off00006855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6855 18328 bytes
SHA-256: 1054070171948e30c43aa2372c28bb4586f99f9ebf927238267b96eb5d2dcf67

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