Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1548d1e9da149f…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 04:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 56b2421e4af5f9271c78e85f441d4e26 SHA-1: 5e6841c7398e9501f2a3463518463ed722e2b2fa SHA-256: fc1548d1e9da149f24f87df501f44198ecf50ab700662f6cc4738dca3a58cc78
130 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'Roblox Robux Hack Generator'. The document body and heuristics indicate a lure to trick users into clicking the malicious link, likely leading to further exploitation or malware download. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

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-robux-hack-generator-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_off0000336d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336D 25616 bytes
SHA-256: 954b9909bd086f1b98e989d14c20446b790d015da41ad205137bbe74ac1c172d
font_01_sfnt_off00006f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F55 2844 bytes
SHA-256: a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1
font_02_sfnt_off000078f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off0000859f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859F 18428 bytes
SHA-256: bdac85b283ea9edec09d9f64e9cfc1f18bf7d6a92d05f58e23f3db2f02fbf028

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