Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d313a8cfcee4813…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 08:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2c636c7707a72fb09a755496d5aeebff SHA-1: 064c67056cca7a1879c40992bd054e1e9363292c SHA-256: 7d313a8cfcee481337a72f931ebc785a458b193e91435e517ec13415619dab80
140 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and heuristics suggest a social engineering lure, specifically a 'ClickFix' attack, attempting to trick the user into executing a command or visiting a malicious URL under the guise of game downloads. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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/minecraft-free-download-android-apk-0.14-0-game-hack In PDF document text
    • http://www.visiblefilm.com/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-hack-roblox-accounts-2021_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_003_off00004b5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5E 24780 bytes
SHA-256: cd2ce34765c8ae00f542b79cb74d52a7d37d03a93db61a9c6b0e93947ba7235c
font_01_sfnt_off00008462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8462 19044 bytes
SHA-256: a5267b563baeeb74a90941775a753387a3f7a1649177b0733d928be729f6d9df

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