Malicious PDF — malware analysis report

Static analysis result for SHA-256 890adcda1fb3dab2…

MALICIOUS

PDF

76.7 KB Created: 2021-07-14 08:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 450cf1b4764b486f035f46810c97304e SHA-1: 11ec34344e76622fe65edbd167c01963afaaf77b SHA-256: 890adcda1fb3dab2116ecf9697300ecba4ea899ca7a49ce893f32801eee395f2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to external resources. The PDF structure and embedded objects are consistent with common phishing or malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7149

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/UQ8tT55rDuk/square?utm_term=to+look+up+in+spanish
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d0b0243cb50e8fb85b8b/1625870512637/theory_and_practice_of_counseling_and_psychotherapy_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8a50e082d905bfad95b3c/1625859342619/fezemujupuxudakowugu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7ca1c217102653d5745f/1626111137284/naturalization_question_and_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec92757d354a5e86a428a7/1626116726052/7546277364.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_off0000ca86.bin
43b1c3097a83a641f887a4bebe263e41fcce539cca7ff935d99edf558247d268		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA86 17488 bytes
font_01_sfnt_off0000f87b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 16792 bytes
font_02_sfnt_off00011092.bin
ad1d28ca19fa82fde8503b05908bc8399a02cc0a46ab10a44fcb42ce313f62da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 10172 bytes

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