Malicious PDF — malware analysis report

Static analysis result for SHA-256 963b63a620efa3f8…

MALICIOUS

PDF

41.1 KB Created: 2021-05-13 21:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 712b68ea5253a5a1334ad4615783d514 SHA-1: 1eb0765976e54cabf3ce4ed7c59935f7e522a035 SHA-256: 963b63a620efa3f8c1438fc6a4b7c0ead430ce9f832c17e9b2be54ce1f211059
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector link, specifically pointing to a 'Coin Master Hack Apk 2021 Ios' lure. This link, https://netcdn.xyz/app/406889139/coin-master-hack-apk-2021-ios-game-hack, is identified as malicious infrastructure. The document body also contains similar text and the call-to-action phrase 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-hack-apk-2021-ios-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_off00003328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3328 24732 bytes
SHA-256: 99550954eedd0af4605f98d5e7b5c0abc1236f57df323a9a505f42fd4203373c
font_01_sfnt_off00006a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00007f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F19 18296 bytes
SHA-256: 1b02b72a612e1dda9bab34fe3417cfa94a6d5b5ff19e2110422fac1f6428c94d

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