Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc582698822fd5d7…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 23:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c39a274cf7db8f25a4cb75fb861c79e7 SHA-1: 68cd081820eb35e1dfb421ca9097ee2e4277c1b1 SHA-256: bc582698822fd5d770e964b827f9be70de3061e589ec05c59b8a6b7d3d1e2d05
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing indicating it links to malicious redirector infrastructure, specifically a lure for 'free generator / game hack' content. The document body text and embedded URL reinforce this, presenting a call to action to access a Roblox generator. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to trick the user into visiting a malicious URL, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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-hack-roblox-to-get-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000029a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29A2 24880 bytes
SHA-256: 0a656478d5a6d2a16246d086de935b183b13d4dde89c25947890b366457404ad
font_01_sfnt_off0000630c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00006cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 18588 bytes
SHA-256: 6723e17a0e3ea7e17da9fa5ee91cb22fe0fa4706a6f3d09ae44dda015c08872b

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