Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec22cf7353674ed…

MALICIOUS

PDF

36.2 KB Created: 2021-05-14 21:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 59d9e114fefa03c7532495432c9798a1 SHA-1: 142f9a9aa3a2b3bfe8a2078462c6bcbc712a36c4 SHA-256: 9ec22cf7353674ed8efd0c0080aaa513b6553731ecf5e8d0bd7d3e25a78b59b6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "Coin Master Free 2021 Spin Link" and a call-to-action button, directing users to a known malicious redirector URL. This suggests an attempt to trick users into visiting a malicious site, likely for further exploitation or credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0283

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-2021-spin-link-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_off000034ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34ED 24688 bytes
SHA-256: 8ac5105cfe927e4156f2346a88558f403fd1c1afe8eca682066a832872d2de06
font_01_sfnt_off00006b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7D 18456 bytes
SHA-256: b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414

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