Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f952fdc74d1984…

MALICIOUS

PDF

36.9 KB Created: 2021-05-21 19:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 97227b5374c176bdd8320ab5df69cbdd SHA-1: b40b02402ee821d8db4d29a659977f5872175e1a SHA-256: a0f952fdc74d1984a3adc83e87bda0088482e87c8149164a231ee962be2c2cd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, disguised as game hacks and free downloads. The ML classifier also flagged this PDF as malicious. The primary attack vector appears to be luring users to malicious sites via deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/minecraft-pocket-edition-apk-free-download-game-hack In PDF document text
    • http://medinup.pt/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/download-hacked-games-coin-master_GM406889139.pdfIn 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_002_off000035d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35D3 24844 bytes
SHA-256: c2b0866880b1cc5744e4aec3b089571536985cf13d8ed037bcbd715869baeadb
font_01_sfnt_off00006d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8E 18788 bytes
SHA-256: 367056a754561f937df838296582abd38218f74b4e704aecd9863e26c36099d2

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