Malicious PDF — malware analysis report

Static analysis result for SHA-256 39db899e94f77f33…

MALICIOUS

PDF

76.0 KB Created: 2021-07-13 00:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4840cc8a6ab0c89064f9022e67b15001 SHA-1: 9ade656383a95c46f55774cdf50245035a1f4026 SHA-256: 39db899e94f77f335289c24ed02873a57464c91dbc4fd00800e4a22588eb6e3f
114 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_SECURITY_BYPASS' indicates an attempt to disable security software, a common tactic in malware distribution. The presence of embedded URLs and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a lure to download further malicious content. Although no scripts were explicitly extracted, the PDF format and the nature of the heuristics point towards an exploit or a malicious link designed to initiate a download, likely falling under the 'Spearphishing Attachment' and 'Exploitation for Client Execution' MITRE ATT&CK techniques.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://feedproxy.google.com/~r/sq/ugae/~3/5JeRQhMeIYg/square?utm_term=miracle+emmc+tool+crack+without+box
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecb2d6db07696a66563768/1626125014995/23866652957.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8b514a8bde38c345b32a/1626114897283/simojilatibifisimuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c570.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC570 16792 bytes
font_01_sfnt_off0000dd87.bin
cd8a04bbbde72ce65fb88571e5a76c7f19c19df7570c6f920121afe3e4e00e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10736 bytes
font_02_sfnt_off0000f64a.bin
980414ab22933d5eb484b42a08f82c8d048024a836bfe2eab542363a7c51a0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 17016 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.