Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bc06170afcbe2b…

MALICIOUS

PDF

40.1 KB Created: 2021-05-19 12:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ab40fa3b536813eda53099cd2ebb8e23 SHA-1: bf3a70b6adade263443a015fa71f89dabf64368a SHA-256: 07bc06170afcbe2ba91018605c48ae9adf98116f5574608ce8b8069edcfc0d47
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure for 'Coin Master' game hacks and displays a fake CAPTCHA, aiming to trick the user into clicking a malicious link. This link, 'https://netcdn.xyz/app/406889139/coin-master-free-cards-link-game-hack', is associated with known malicious redirector infrastructure. The document's structure and embedded content suggest it's designed to facilitate initial access via social engineering, likely leading to a secondary payload download or redirection to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • 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-cards-link-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B1 27044 bytes
SHA-256: 27031e4e0166a99eaea6ebd8c087ea78912b7c6ca4581a892117710207a58be3
font_01_sfnt_off00007203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7203 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEE 18056 bytes
SHA-256: 4c00fba11e6222d30ce91962ad0846eff86227a46da4e4704094e367f0981575

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