Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff72d33d6beae566…

MALICIOUS

PDF

38.1 KB Created: 2021-05-13 01:02:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4ef5ef5b446f84435d7ba48f2f0a8b8a SHA-1: 47b98ac18d435896ad41be68256424a742971428 SHA-256: ff72d33d6beae566dd779dcd439f5211f866e4172572e1febba6ea4250eae9e9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it's a redirector lure for 'game hacks' and links to known malicious infrastructure. The primary URL identified is a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-spin-free-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_off00003719.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3719 26412 bytes
SHA-256: 19635b10fa7b37f5f1b60b11f58d458f96b001abe59d3a8132c89d8bd9156de8
font_01_sfnt_off00007381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 18308 bytes
SHA-256: 213ea0fed5678e19eff32fcc5d46e69a4f1b73f67043b57a178cf12547108d4a

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