Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8c204c1f72462f…

MALICIOUS

PDF

39.1 KB Created: 2021-05-10 11:40:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 973fd4d2b0323c3949a22b376307b81a SHA-1: aff48e3c02eb8bcba801b33907c092688b17c281 SHA-256: 4b8c204c1f72462f1a5181ab819aef8d07462efc4fa2a7d3ffbaf673bd00ba7d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure related to "Daily Free Spins Coin Master 2021" and a link to a "free generator / game hack". This suggests a social engineering attack aimed at tricking users into visiting a potentially malicious website. While no scripts were directly extracted, the PDF structure and heuristics indicate an attempt to redirect the user to the provided URL, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

Heuristics 4

  • 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.
  • 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/daily-free-spins-coin-master-2021-game-hack In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32DD 24944 bytes
SHA-256: 4febcc0e327165d5bc5f76409986e2928fe44125534d01c5698c9426602e957e
font_01_sfnt_off00006be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off0000760f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 18708 bytes
SHA-256: 76af36f54327e394f6a0995f5c1804c6d580e71cb7eebf938ec25838add40309

Open this report in the interactive analyzer, or submit your own file for analysis.