Malicious PDF — malware analysis report

Static analysis result for SHA-256 713de3a66ba83579…

MALICIOUS

PDF

34.7 KB Created: 2021-05-11 08:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8eb7327931842a88c1f65a6a4046eeb5 SHA-1: ed97e27f5697b326baf54e79111009c99ce810a6 SHA-256: 713de3a66ba83579389936de8aa46c40904d3bd01014d1776ead58126fde3b47
130 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating a malicious redirector link disguised as a 'free generator / game hack' for Coin Master. The embedded URL leads to known malicious infrastructure, and the document body contains text and links that reinforce this lure. While no scripts were extracted, the PDF structure and heuristics strongly suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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-gold-cards-free-link-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002f79.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F79 24152 bytes
SHA-256: c23a3d6ad4749a15fbe88543a31656a8b86ca125a3f314c643a600149bc152d9
font_01_sfnt_off000066c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 18128 bytes
SHA-256: 3c7d889e052bb081026c5a88f6ee2afe5bc892e32bf973502febc93f4313d009

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