Malicious PDF — malware analysis report

Static analysis result for SHA-256 3138129318b53797…

MALICIOUS

PDF

39.9 KB Created: 2021-05-21 07:18:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c1b0bce1bd78dbcc0261a4c0b56804c1 SHA-1: 26602bea1ec34b6fc64beda6af50fb629acc2556 SHA-256: 3138129318b5379776d2ffc4abb115bdd6553031e005d6c1f43894a1b3c507d2
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 0.8060

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/robux-free-gift-card-org-hack-game-hack PDF link annotation
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-complete-handbook_GM479516143.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_off00003015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3015 25744 bytes
SHA-256: 984c87661b658e6847741921944af5b97a99ddf9d1739a267e746d8f250d42ec
font_01_sfnt_off00006abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABC 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000077ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 19096 bytes
SHA-256: bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac

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