Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e9fc34a29595d2…

MALICIOUS

PDF

50.2 KB Created: 2021-05-12 06:31:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8ed227428523db3fcf9b0661a4e9d8df SHA-1: 7428785e8d6be81c9adc3813bafdafc96eea1f65 SHA-256: 12e9fc34a29595d271e223531d319eaf49bf769ec9998d02bbd053d18ae9fb7e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL, 'https://netcdn.xyz/app/431946152/roblox-no-download-hack-game-hack', is the primary indicator of malicious intent. The document body and metadata confirm the lure is related to 'Roblox No Download Hack'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0121

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/roblox-no-download-hack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3334 39940 bytes
SHA-256: 53a9d661c2fb1a71a394e84c6cf4958ca5373f39d46e1baf9d6e65703eceb0c8
font_01_sfnt_off00008b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B08 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off000094c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C2 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D4 18688 bytes
SHA-256: d5d7cfea6fb7c102685ba8f1dd19dd1f71835ac40da00045e859a47e2011ef1d

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