Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2566c5759886ae…

MALICIOUS

PDF

80.0 KB Created: 2021-07-12 20:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 210353ff26925db9728063acebe91e9e SHA-1: 087cd6e4257ce9770ef07360b38ac5875b2045a8 SHA-256: fb2566c5759886ae3d369096b6748c4c7e60d8a118e70dd386738b31510164e9
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI suggests it may attempt to download additional payloads or redirect the user to a malicious site. The file's structure and content, despite being obfuscated, align with typical phishing or exploit delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8571

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aauXj3bnHUA/square?utm_term=can+smart+tv+open+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec787bc268f363b085a3bc/1626110075308/nofigokeba.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8fe26aa30721e65ed9807/1625882150836/4828889649.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e80c46efb14d1122134bc2/1625820230267/excel_combine_multiple_cells_into_one_separated_by_comma.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7a8fc217102653d52ffd/1626110607417/6213064283.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8bc68b825900159c18538/1625865320462/nolut.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ab902efae11aba9f8596/1625861008771/empty_chair_therapy.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_off0000d7ef.bin
2bc58c07cd054dfabedfd1443a68a05f1f6b4aaedb4f784ba2dc31766e1bc768		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 16840 bytes
font_01_sfnt_off000103eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103EB 16792 bytes
font_02_sfnt_off00011c02.bin
42bc1335ef31ae4e8e0a02e6b19a4e1601f4a11aa54af5b38b45911e0e2f8222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 10616 bytes

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