Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81be888be81f761…

MALICIOUS

PDF

74.1 KB Created: 2021-07-17 04:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 682e4b674c303ebf2cede283ea1e99ff SHA-1: 1f589017bd43728598ea6f4545b58fadd8eb07e1 SHA-256: e81be888be81f761d923ca6b41a5c9f1838f4ec8babe1ac47eeceeb9f3d5c2b9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV, indicating malicious intent. It contains embedded URLs that redirect to external resources, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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/razvivatel/yapz/~3/gPkW7oTCsL0/square?utm_term=what+does+under+contract+mean+on+a+real+estate+listing
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edd718ea8d40126a1b37d0/1626199832713/velocity_and_acceleration.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f235ffabd24e3ae570d2f1/1626486271669/functionalism_and_conflict_theory.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_off0000c409.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC409 16792 bytes
font_01_sfnt_off0000dc20.bin
2e9b7eeb07266660b9155f12ebe344c6252bbd4a22a371178a788d4177e595d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 10912 bytes
font_02_sfnt_off0000f4f3.bin
4f0e1f1e84568df6c312f305cfede330f4584aa34bfc9521fc29b4f26e867751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 15436 bytes

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