Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1c56c7fc0dace2…

MALICIOUS

PDF

39.2 KB Created: 2021-05-15 02:30:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4f948c56c554a56ba38eda77239063d8 SHA-1: 0a1eff9b677d569f31b32312b023d2a445b6445e SHA-256: ce1c56c7fc0dace25da38dedbdaab1e4547d9b3c69b262d50bea567a8243f0a3
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 "Free Robux Hack Generator" and embeds a link to known malicious redirector infrastructure. The document body also contains the URL and a call to action, suggesting an attempt to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF format itself can execute JavaScript, and the heuristic firings indicate a redirection to a potentially harmful site, likely for further exploitation or malware delivery.

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/free-robux-hack-generator-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_off000032c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C2 26948 bytes
SHA-256: 6094544d35603bc83d5dd78bf1d62851be1d73656d66bbed4baff4c4ef993168
font_01_sfnt_off00006d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4B 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000076ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 18516 bytes
SHA-256: ac45002ee2c78c55a094f6344a5e95abe10f4ed7f4298fc77d5376065a98214b

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