Malicious PDF — malware analysis report

Static analysis result for SHA-256 155e85122feaa1b4…

MALICIOUS

PDF

40.0 KB Created: 2021-05-23 07:11:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f09a0e1ab7e0868b81ef657c98a0a3a7 SHA-1: 1642a14cffa4a3c3e4d81cbdf87a5d11bc1a46f9 SHA-256: 155e85122feaa1b40a284ebae82b472ccebb1c0ff6552d49b121883b23090be5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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/coin-master-free-spins-link-blogspot-2021-game-hack PDF link annotation
    • https://inspective.nl/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://inspective.nl/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://inspective.nl/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://inspective.nl/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://inspective.nl/images/coin-master-free-daily-spins-and-coins_GM406889139.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_002_off00003547.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3547 24840 bytes
SHA-256: ee4922e6338e922c7c5bd817373e0283476ef82e49035821016554833c0cc052
font_01_sfnt_off00006dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD7 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off000078b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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