Malicious PDF — malware analysis report

Static analysis result for SHA-256 040467997739d54d…

MALICIOUS

PDF

37.3 KB Created: 2021-05-17 09:35:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a86532a7964f3b9e556486e18b1a1773 SHA-1: e08aef4e4b0529ebe3679f08dbb9be5526794b88 SHA-256: 040467997739d54d84460d4c89a722e851bdea1844af4222418185b32e7b2d78
170 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. This lure is further supported by a fake CAPTCHA heuristic, indicating an attempt to trick the user into interaction. The embedded URL leads to a known malicious redirector, suggesting the primary goal is to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0129

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/free-spins-coin-master-app-ios-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00003242.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3242 23624 bytes
SHA-256: e868945c900894ec67cb11d37131526407acd595c54424719c039851105deb7e
font_01_sfnt_off00006785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6785 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 17884 bytes
SHA-256: baa69023d18af7e6e292b7ed0352255ac8c665d65dfdd35f206937513cc9840e

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