Malicious PDF — malware analysis report

Static analysis result for SHA-256 827fe04c86505f62…

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 00:06:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 95a2e71c766c590d00c2af206769a2fa SHA-1: 61959e187a56f19b7c2e335ef731bf3aa61d3f93 SHA-256: 827fe04c86505f6277da426aec25e81c20e4407d3ebe563aaab12ae219c99216
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a malicious redirector lure, specifically referencing a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-place-game-hack, is identified as malicious infrastructure. The document body also contains text and links promoting this lure, suggesting an attempt to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0115

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-place-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_off000033e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E3 24124 bytes
SHA-256: 5c1a7a20ae149e6c2d885c26be93431e0cb8e571c66966b93dc44342a28b87b7
font_01_sfnt_off00006b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B08 3096 bytes
SHA-256: d05729863dc05721ada29044278030255eeda038236568e8246a87d3a8573d6e
font_02_sfnt_off000075af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AF 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_03_sfnt_off00008792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8792 18472 bytes
SHA-256: a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691

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