Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb983e4453672494…

MALICIOUS

PDF

39.2 KB Created: 2021-05-10 11:10:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1b88dddc98b481d0796d0a14cb156365 SHA-1: c0303dcbc2156249cdde0e46f6873211dd80924b SHA-256: eb983e4453672494311184ff7c91c003314532542413ad3a5487883d59dd60c0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "Robux Hack 2021" and a "CLICK HERE TO ACCESS ROBLOX GENERATOR" call-to-action, which redirects to known malicious infrastructure. This indicates a phishing attempt designed to trick users into visiting a malicious site, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/robux-hack-2021-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_003_off000033c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C3 24672 bytes
SHA-256: 7ef3ab5527a727cf85593682893792fc52c9d0efd1d3d7d0c009977c6d727a8e
font_01_sfnt_off00006c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7686 18648 bytes
SHA-256: 960613bb0fa4c19a2503237e067522a4d484b1b5f3e7387dbdf2c2d9282ca05f

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