Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dd48910b4d37cb…

MALICIOUS

PDF

77.1 KB Created: 2021-07-18 06:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85cce2d969c41abbe938b597b80506c3 SHA-1: 28a9da7607fcff4bf23259b6387416852e6342cd SHA-256: 58dd48910b4d37cb7d7755134d53198ed86dc460bc1d14c3c86a562d12c16dbc
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The presence of embedded URLs suggests an attempt to lure the user to external resources, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure and heuristic firings indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/uzX87CUNjRg/square?utm_term=intouchables+watch+online+free+english+subtitles
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2bf97731d8c7c6ff603c4/1626521495429/signs_your_anemic.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1902131ee6a1029a59b88/1626443809953/what_does_a_clothier_voodoo_doll_do.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d581bf13e579204bcab6/1625871745616/59956350581.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94076085b1c120f992e13/1625899126866/essentials_of_mis_12th_edition.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_off0000c985.bin
5dd99ed067f6fce2ffb969fef66ac3089ac82ebf09f330404d72d64bc9531933		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC985 16808 bytes
font_01_sfnt_off0000f523.bin
df112b80f421a55bd72802d4d2e76c9feebd4eb5a16da2a385cbaac36d236425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10892 bytes
font_02_sfnt_off00010e5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5B 16792 bytes

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