Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f31923b35e380cb…

MALICIOUS

PDF

36.1 KB Created: 2021-05-23 07:35:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d7ad0d4e322100f97bcb66d95946c145 SHA-1: 66bacde6f02e0e26fcddbc5a64c90cd2144d2f75 SHA-256: 3f31923b35e380cbc5aad20fafda096b2b6fa14fc7678f8974484d47d59aa942
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and known malicious infrastructure, disguised as game hacks or generators. The document body explicitly contains calls to action like 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and directs users to download pages. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-free-ios-game-hack In PDF document text
    • https://shimony.net/images/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://shimony.net/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://shimony.net/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn 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_off0000330a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330A 25656 bytes
SHA-256: 3a3062ed6dc26b2eef754dfabaae94bddbe686e6621e2d76e080b7268465b092
font_01_sfnt_off00006daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 17712 bytes
SHA-256: 54d91aee1a0896e30cfb652b9b9fc91e7951cfaa65da7a48657c461bc2dd637d

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