Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48d79762fe38ef7…

MALICIOUS

PDF

34.9 KB Created: 2021-05-22 20:41:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d58b1fbfac8720c8db4e571493a4aa19 SHA-1: 58d0e4c6251229308e7f2d9fe249a8cb85e46b5b SHA-256: b48d79762fe38ef7dee4330f7bcd4a5c53a9ee93274e53fee968fcc17322f802
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL `https://netcdn.xyz/app/479516143/minecraft-bedrock-free-game-hack` is flagged as malicious. The document body also contains this URL and a call-to-action phrase, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be a phishing attempt via a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/479516143/minecraft-bedrock-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
font_00_sfnt_off00002e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5B 25240 bytes
SHA-256: 217d67d5d4bd522508bf894e5ad6b21e874bfb889b074dbc14157cac712293ad
font_01_sfnt_off00006774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 18268 bytes
SHA-256: 421dc37018d5e6f1467ffbccbacebf5894202cb157ac672e86022266516fa266

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