Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5c1378c191de88…

MALICIOUS

PDF

86.9 KB Created: 2021-07-17 14:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 333a5923d34fda7356a7dfc689e63a27 SHA-1: 3b2ce1de618a4800893ebe952b766b754661ee51 SHA-256: 4d5c1378c191de885c94c2ddb9ecb7eb21175b29ea2500d9a8c605cd155056cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a Google feedproxy URL, which is often used to obscure the true destination. While the specific URL is marked as benign, the presence of such obfuscation techniques in a malicious PDF suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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/AnJPYMJXbyQ/square?utm_term=top+10+thriller+movies+in+hollywood+tamil+dubbed
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7cf0df29cd6423db3e7fb/1625804557769/stravinsky_concerto_for_piano_and_winds.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1531d6e32095df9858664/1626428189478/mcq_on_operating_system_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede5c04ff81d3e28150834/1626203584890/sanotixiliginowikepa.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0cb43e9ec2a4c2bd49467/1626393411282/constructivism_in_the_classroom.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1d14a1d8f6a6dd2ad3af9/1626460490941/value_stream_analysis_examples.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f268a4a8f65e35b6d0875f/1626499236536/foods_to_avoid_if_you_have_calcium_oxalate_kidney_stones.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed5d834918f36a6d5f637e/1626168707500/use_of_between_and_among.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91d99b9b95949b65e9bcf/1625890201588/2nd_puc_physics_question_paper_2017_march_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f07780cd12aa5cbeb7eebb/1626371968706/absorption_costing_profit_statement.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_off0000eeb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 16792 bytes
font_01_sfnt_off000106c7.bin
3ae743a6fe160b8005e066b7f942bd837bc5f6def055a8929440af1d292463fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 17760 bytes
font_02_sfnt_off000134f6.bin
2234cceb546d770dbd657dfa0a676eabeb030d694b13bacc97ea3b7d0f567e89
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F6 11300 bytes