Malicious PDF — malware analysis report

Static analysis result for SHA-256 d303a82583e2d864…

MALICIOUS

PDF

39.4 KB Created: 2021-05-12 02:26:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f05a8c4e2138ace421fc1ea354da8e9a SHA-1: e111ffeddd6c6926c7909ab9283b1e9f1a1cfa5b SHA-256: d303a82583e2d8641cba3dc5d45897fa729a0f896875d6b8d8ce87214cd23442
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a critical heuristic indicating it's a lure for recovery secrets or private keys. It also features a high-priority heuristic for a game hack redirect, pointing to the URL https://netcdn.xyz/app/406889139/free-bling-bling-card-coin-master-game-hack. The document body, though partially garbled, contains text related to 'Coin Master' and 'generator', reinforcing the lure. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/free-bling-bling-card-coin-master-game-hack PDF link annotation
    • 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
stream_003_off000034a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A4 24768 bytes
SHA-256: da32e4d1e586bc5135082aedd9e5bba3b40e05f33580e6d6e1748dc1de220354
font_01_sfnt_off00006e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 2880 bytes
SHA-256: 29ffac6ae2c225ad742d302df2deaca7764d0abb58a6f2c81d3137a4f416ba07
font_02_sfnt_off000077f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F4 18464 bytes
SHA-256: badeae9d55bf39d9f494a82973880599056e8fc325ea5045f08d6a1cb132f119

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