Malicious PDF — malware analysis report

Static analysis result for SHA-256 4400cf4566501da3…

MALICIOUS

PDF

36.3 KB Created: 2021-05-24 02:36:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bb04987bdd5be68179d0e63ecd65e85a SHA-1: 7dd165c4c924367c01ab5677fe53440b39b1a709 SHA-256: 4400cf4566501da33d65962000db1304ec8426ea360ddcff315eda1c8e37d505
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to websites offering "game hacks" and "free spins" for popular games, which is a common lure for phishing and scamming operations. The heuristic firings confirm the presence of malicious redirector links and a game hack lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious or scam-related content, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/coin-master-daily-free-spins-game-hack In PDF document text
    • http://abris-jardin.be/images/roblox-2021_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-offline-hack_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_off0000336e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336E 24844 bytes
SHA-256: b0dc84dcab9b9055f2f0e00c9d6b5a7b378f79ffce7fcf855e208b4a13e8d345
font_01_sfnt_off00006c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C57 18308 bytes
SHA-256: e42bde5f0ce420544e36e42831a39ceefa2103814e02a0c87b67b282abd28734

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