Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccb86183c74d606…

MALICIOUS

PDF

38.5 KB Created: 2021-05-17 00:16:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6a315381a07636e177e036321fd38bac SHA-1: abe8757eb44493d16d8746ef03432b4643eec8ba SHA-256: 0ccb86183c74d606050188a98b5c8bc874b7b582629f1210708e65ba5d785458
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to malicious redirector infrastructure, specifically a lure for a "free generator / game hack". The embedded URL, https://netcdn.xyz/app/406889139/hack-coin-master-free-game-hack, is associated with this malicious activity. While no scripts were extracted, the document's structure and embedded links strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful sites.

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/406889139/hack-coin-master-free-game-hack In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C6 24604 bytes
SHA-256: 3461a4b2d2ea51169e6265e9e0d8ce233ba570b750cfbd0555007ef7963f2316
font_01_sfnt_off00006c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1F 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000760a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 17880 bytes
SHA-256: 257aee740a5ae17e91b93ad4d540c168849f24efe28ef42b55966c96749a0114

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