Malicious PDF — malware analysis report

Static analysis result for SHA-256 d599463994109354…

MALICIOUS

PDF

44.1 KB Created: 2021-05-21 10:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c021f0f1ec6787318ce40b131beca493 SHA-1: 46e8991c46291f4d6ed0099cd31fd20762593612 SHA-256: d599463994109354845af567e4c4392e767b513d04e277792e15b9bd1e5132d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9538

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-get-free-clothes-on-roblox-game-hack PDF link annotation
    • http://foo.com.tw/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/tiktok-free-prints_GM835599320.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00003609.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3609 39684 bytes
SHA-256: 8afa994b5ca46a0160f891287686c730d852d07338dff72d4d3a4bec9951c643
font_01_sfnt_off00008b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B83 18384 bytes
SHA-256: 27f4650814c4f3019db148b37ee61815def53d60a0d59245006e52e54048c2c0

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