Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d846c7622491166…

MALICIOUS

PDF

40.3 KB Created: 2021-05-22 19:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6e257593c8d21c416747dd88a151bd18 SHA-1: 23f52fecd07282bf0bb12d110f54e1406c9f018c SHA-256: 3d846c76224911669a500a7a4785c22e78277d03cc3d1d424f1ade3ca8411956
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 0.7776

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/431946152/free-robux-games-game-hack PDF link annotation
    • http://medinup.pt/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000331d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331D 27804 bytes
SHA-256: af4c1fc46133e87e0da97c6a8e3b19f0b50e88a0d61522213f33cbb8379ccfdc
font_01_sfnt_off00007173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7173 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 18500 bytes
SHA-256: 50954281d46d1092d2c36c5fba9e04257001c8c7e5b0c8732206987489559ecb

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