Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e400f283dc96d21…

MALICIOUS

PDF

34.1 KB Created: 2021-05-22 15:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 52ac9f10a3950ced07f13930e43ad491 SHA-1: 8a441e42ab476a3eecde53458ca26c37f7465f6c SHA-256: 8e400f283dc96d211e16ba0bd5f137feca01a2658f03ee0ec5a80809f0f207fb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a malicious link disguised as a game hack generator, intended to lure users into downloading a payload. The link points to infrastructure known for malicious redirects. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest a social engineering attack aiming to trick users into visiting a malicious URL.

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/406889139/coin-master-free-blogspot-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_002_off00002e3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E3C 23600 bytes
SHA-256: 505e14cf6d4493f71b08f3d38e754e80866dee5ea98e82226cff72cc8e624e2e
font_01_sfnt_off000063c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 18464 bytes
SHA-256: 3d1506adb004325b5ad849f11167115e1f90dbd1428f7e6d98779d75984a0c30

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