Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c1039c889bcecd…

MALICIOUS

PDF

78.4 KB Created: 2021-07-18 09:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a947680be6ba752fd6717850c455f605 SHA-1: 075b04c2220fb14826d79d2725da107df7da50bc SHA-256: f9c1039c889bcecde258b3352f3e1e6d3cfa22b918ac1a7c5ff8cbe78a1864b1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a compromised or malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8755

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/um1bUVUAM38/square?utm_term=sql+insert+multiple+rows+from+another+table
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec84cf7e2b6271615b96cc/1626113232041/chinese_culture_in_mulan.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3b86d80d83038fa86a78a/1626585197470/80336841343.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee7175aa539923b5899e7a/1626239349889/dr_anand_ophthalmologist.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f05d001b53817b679b51c5/1626365184758/linux_date_command.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8b24b6dedd3ae169a1fe/1626114852524/dopomijonuni.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f090cb78de530e1d4282e9/1626378443184/47798045259.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee46082a4cda17625e9c70/1626228232919/beyonce_featuring_shatta_wale.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_off0000cf93.bin
5d262d767da14c36d34d0136db93202bf059c7c4fb535ea25d8afa6547d3b9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF93 11172 bytes
font_01_sfnt_off0000e94b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 16792 bytes
font_02_sfnt_off0001015d.bin
fcdada6c07cd154e4adb66d33da456db75a3601d3ceae9a82c8ae14879c8b503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 16920 bytes

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