Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d4e48042597163…

MALICIOUS

PDF

36.7 KB Created: 2021-05-23 15:15:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b1c0b376e5c1eda96c669bebb888f03f SHA-1: 0f1073c1b2f61db856e43c8ffb9cd3844d7d3e74 SHA-256: 64d4e48042597163a838180a8534383b35bb7665cd467687820b7a0ac31c9f68
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The document body explicitly instructs the user to 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', and heuristics indicate that the PDF is designed to trick users into running commands, consistent with ClickFix attacks. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/how-to-make-a-minecraft-server-for-free-game-hack In PDF document text
    • http://krumerhaus.at/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/minecraft-windows-10-free-code_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_off000034dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DC 25432 bytes
SHA-256: ba2a6b76c015d82c3e37721f6a7b1bda8d7119e418317d37b160a30ef6aa1072
font_01_sfnt_off00006ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA6 18156 bytes
SHA-256: 7ebd6cc6f7d73451d43dfe99dc02d56d86c4e3c51693199467050b16fbe82799

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