Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd624991c38fc5c…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 22:38:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e590381d9ca6cb13c817b9c85c3b214d SHA-1: aafbb21c930508f413403eeed8ddd69578a746d7 SHA-256: 0bd624991c38fc5c285a6e01a0033e28b25e43aff0ab9678219cba045c4156ac
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 0.9447

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-2021-game-hack PDF link annotation
    • http://gaec.cl/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/pubg-uc-buy-paytm_GM1330123889.pdfIn PDF document text
    • http://gaec.cl/images/robux-premium_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-hack-without-verification-code_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000330b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330B 25492 bytes
SHA-256: cda6dfa20508f181431fc85094ed19e393f142f802bae9ef6ebecb535b8356c0
font_01_sfnt_off00006eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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