Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc78555fa344a52…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 17:40:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9bf2c3fcdd90a55a3cc16605d83f895b SHA-1: 69ae36fd1f8afc87dc040e5de9fe5fc4c1202023 SHA-256: bdc78555fa344a52f3c88e9391e7281a2fd732f9cc2990b048663c2b9f836ac7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, many of which are related to game hacks and free in-game currency. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. While no scripts were extracted, the embedded URLs suggest a phishing or scam attempt designed to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-many-free-spin-links-is-there-for-coin-master-game-hack PDF link annotation
    • http://italyfixer.com/images/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-map_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn 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_off00003e13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E13 24684 bytes
SHA-256: 2a44455727367697e38d9a5e29b4c86d259602d9fb6bfa3adf7f4dff36c11941
font_01_sfnt_off000076a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A9 2932 bytes
SHA-256: 6a728a9066ba65435d6380d78d87d8ee4d5553deba8217e5dee5b64eeb83287d
font_02_sfnt_off000080d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D0 18564 bytes
SHA-256: 570b0c61311575f79f3042bd24f9f673b4866dc3d196f598a36d155a291d7be6

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