Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74b2a30478bd9e5…

MALICIOUS

PDF

36.3 KB Created: 2021-05-10 12:32:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 646f2bc901d034e3c763e42fa03551ae SHA-1: ab68c3e91382c24b1b8e3789dfca8e3f580627c0 SHA-256: a74b2a30478bd9e5e03739c21af76c91596f2149cbbe6b22de2ebf2d63fc8e18
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The heuristic findings indicate a lure for free generators or game hacks, and the presence of embedded URLs confirms the redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are sufficient to infer a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier clean score 0.0303

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-free-link-today-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003535.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3535 24548 bytes
SHA-256: 244c09bec9647c2592a7930438ff20398ded18396986cb4aaf5b55aa83f90f4d
font_01_sfnt_off00006c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C79 18232 bytes
SHA-256: ac7637c34b6ea6a17139aeea995219f6842183aaecfc204fce9d36f337c74847

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