Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d43a0b2725a48a…

MALICIOUS

PDF

39.9 KB Created: 2021-05-18 03:30:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 93790032b52f3cbd153b22b1937034c9 SHA-1: 25c8fe5579345bdcf1c92443afacf81a0084637a SHA-256: c0d43a0b2725a48a4671b48fd8dee3890f67527d230fbebb60a65f309f39038e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a site offering 'free generators' and 'game hacks', a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a general lure for free items. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/431946152/buy-robux-free-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000348e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x348E 24956 bytes
SHA-256: 4af668dd0d01c43b003325d7a486b4417e1b361002b84e442cf6a0262460c3c2
font_01_sfnt_off00006e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E08 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB0 18196 bytes
SHA-256: cb12c4d5dde36c76c1d8ec5571b03ead83a0fa8ffdaffe515056ff0ebc75f1e1

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