Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecb342984beb857…

MALICIOUS

PDF

37.2 KB Created: 2021-05-24 21:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b5b6589fa4d7ad8f3345730ba3773beb SHA-1: 2a3277986f2bb24ede3772538e6527b105c62234 SHA-256: fecb342984beb857315d97d3e1a6df2c166e503544c946ff732d42be00af436a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links and a heuristic firing for ClickFix social engineering, indicating an attempt to trick the user into executing a command or visiting a malicious URL. The document body and extracted URLs suggest a lure related to free game downloads or cheats, which is a common tactic for malware delivery. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-play-no-download-game-hack
    • http://unifieo.br/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://unifieo.br/images/coin-master-free-spin-today_GM406889139.pdf
    • http://unifieo.br/images/play-minecraft-for-free_GM479516143.pdf
    • http://unifieo.br/images/www-robux-com_GM431946152.pdf
    • http://unifieo.br/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034c5.bin
d291f17b23b529aa7e023ce27ccd4e2c03482907e1f5326f5a31946cbf14f508		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C5 25784 bytes
font_01_sfnt_off00006f04.bin
fbb9b780a0bb14823a54994ffd1331078a17861a297534d48eb4e2856c7fc06d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F04 18624 bytes

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