Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b245e215db8d019…

MALICIOUS

PDF

35.6 KB Created: 2021-05-22 11:26:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 751602fbf3d020a48389422594d4917d SHA-1: f5fc463c2808c6281994669625e9a9b965b59550 SHA-256: 4b245e215db8d01996e3372481b7ca7b1411b8eeed116f7e7bc1412876ec0949
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, one of which, 'https://netcdn.xyz/app/479516143/minecraft-online-free-download-game-hack', is identified as a malicious redirector. The document body also contains phrases like 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', indicating a lure for potentially unwanted content or further malicious activity. The presence of a download button lure and ML classification further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-online-free-download-game-hack In PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/is-minecraft-vr-free_GM479516143.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_off00003229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3229 24336 bytes
SHA-256: 2f4bed6e5d95bc38c19338dbb0f85c03e527944e36fc035cfb9edab22ecf666c
font_01_sfnt_off000069f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F2 18292 bytes
SHA-256: a2a63f8c18687518d260bdaa10b8e62a526b9456f69b3d2706eff3b892369b89

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