Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd11edc28d0b183f…

MALICIOUS

PDF

74.5 KB Created: 2021-07-18 01:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86e032ea787f39a9f331adb3f1b947ba SHA-1: 3509b05fcb4094a64840954f5b1dd74eab7fcbce SHA-256: dd11edc28d0b183f3fb957e3956e30d5e082c21436c7cb665ad87e44990f68bf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/hIkXU_AiHkM/square?utm_term=coroutines+play+services
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f00ad61c2a3138378ec664/1626344150699/66489662460.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f069882201fd657d0113f0/1626368392272/ernest_tubbs_record_shop.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edaca97d02012a36336d14/1626188969804/tagin.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f34d61d68f322590594fa2/1626557793264/remittance_meaning_tagalog.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_off0000c19f.bin
346c23d16b17f5f5d16fa5a41408f37f4c042e16867b3b2233fb96d4d0a77e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC19F 10676 bytes
font_01_sfnt_off0000da50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 16792 bytes
font_02_sfnt_off0000f262.bin
3f6747e01795aa22b68e9ea100e65500fd08147bcc5eb79b705508912e6668be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 16880 bytes

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