Malicious PDF — malware analysis report

Static analysis result for SHA-256 beed887e36f1228b…

MALICIOUS

PDF

37.9 KB Created: 2021-05-12 07:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 69379221afd830a30e7ac63be741b7a5 SHA-1: 095b9ce2abc18b6f31f03811aa9b58b4cc98a7f1 SHA-256: beed887e36f1228bc3bf31e685f379da21d23a74cd9711cfb051b90e093ddf4d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically disguised as a 'free generator / game hack'. The embedded URL leads to known malicious infrastructure. While no scripts were extracted, the document's structure and heuristics strongly indicate a phishing lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0126

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/406889139/oginject-co-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_off0000329e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329E 25028 bytes
SHA-256: e800db713eebcc81592d53613ef59bafea5fa7d2fb902b3cbe9473c9577ee34c
font_01_sfnt_off00006a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000073f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F8 17796 bytes
SHA-256: edfc933cef9a2285abe675eee9fa95d4e262eddbac9f1810b55b91553a16c6ad

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