Malicious PDF — malware analysis report

Static analysis result for SHA-256 a774ae4a7cc0aa0f…

MALICIOUS

PDF

35.6 KB Created: 2021-05-19 15:07:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 96c246d49558680834732cd6361b19fe SHA-1: 5635210d4b5ffae4a9233b5747aa0ff791716865 SHA-256: a774ae4a7cc0aa0fd0393fd0f5f1b15382fd820fa687b6ebd40b449091387087
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a known malicious URL, masquerading as a "Coin Master Free Coins Link" generator. This lure, combined with the heuristic firings for malicious redirectors and game hack lures, strongly suggests a phishing or scam attempt. The document's structure and embedded content indicate it's designed to trick users into visiting the malicious site, potentially leading to credential theft or malware download.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-coins-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_off000030bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BC 25056 bytes
SHA-256: b5ce7700fd5817b07c3b018a5d395509414ef810c163f4ea17b2e978b01d538a
font_01_sfnt_off00006ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD5 17880 bytes
SHA-256: 5ce88b684446e36e89a0643934549b22fce1d776877bbe9d9a558feafde7429d

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