Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de6d49cbefe8479…

MALICIOUS

PDF

38.4 KB Created: 2021-05-10 22:37:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 462af5406e48920c8b32d36e65b906fd SHA-1: 3ccf052e31508083aeb29664b824ae4c360e3fa0 SHA-256: 1de6d49cbefe8479e16256fb7f346584e3d0cdcf87f3bfb23e4c7bce23589947
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'Free Robux Redeem Codes' and embeds a link that redirects to malicious infrastructure. This indicates a phishing attempt to trick users into visiting a potentially harmful site. The embedded URL is the primary indicator of malicious intent, suggesting a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-redeem-codes-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33EE 27148 bytes
SHA-256: 52f5a0fba12a86a74dc5f68befaf4a536f1e18aff41b84e544096016befa8a15
font_01_sfnt_off00007447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7447 18448 bytes
SHA-256: ac1fbd71dc65d7a5013a2beb110170fe519d7ae17df877d161357825f85fd2ae

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