Malicious PDF — malware analysis report

Static analysis result for SHA-256 21caca1976046130…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 23:04:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 27e2660b6007b5f6ad60119519730bc3 SHA-1: 2064c44490a5d3b4d650411f968049489412d962 SHA-256: 21caca1976046130478b917f397ead59dc9d4cf18cd11c88c1853f91a282f2f6
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 0.9492

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/479516143/free-minecraft-survival-server-game-hack PDF link annotation
    • https://shimony.net/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/coin-master-free-coins_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_off00003650.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3650 24644 bytes
SHA-256: bdded77f48ff3bf0b3102fe507426397ef1dc00e00bbacb79114be1156bbc355
font_01_sfnt_off00006e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E91 17896 bytes
SHA-256: a416ee995e2fcdad104e8f08570a8c057a7877f0093c65a8eab662d227b30cb8

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