Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c8975e95e302b0…

MALICIOUS

PDF

80.6 KB Created: 2021-07-19 08:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bec104e2953af7d9b5e8d5d84810ae17 SHA-1: 05fa0a57d0e06abc2915dccd254e29702f624cea SHA-256: 84c8975e95e302b0dd81a7664d40926a228e1bdde174e9bdddb2ec910a289b3d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. It contains embedded URLs, though the specific URLs extracted were classified as benign. The document body is unreadable, suggesting it may be obfuscated or contain malicious content not directly visible. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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/jEScUJLm1bs/square?utm_term=enthalpy+simple+definition
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f223e54b68c137e68f8b16/1626481637330/autopoiesis_and_cognition_the_realization_of_the_living.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee452202e0767984f40c3f/1626228002534/implications_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9383de51f1f218d6ac4b8/1625897022086/36766406425.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0d54393f2b30038099741/1626395971556/lavowiwodatisokuzodi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f198c93831c76a2ec988fd/1626446026142/meaning_of_inconsiderable.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4b024c4d0d61e6747b1e7/1626648613461/30520465157.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e79cc8b977dd1475c65811/1625791688880/tinea_infection_in_groin.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78204c0b954f9ea31bd0/1626109984899/chatterbox_gary_full_episode.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_off0000d7df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 16792 bytes
font_01_sfnt_off0000eff6.bin
5ad648fc89f039710895e2c43635015953790246eb1e01da7fbcddab937da0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 10760 bytes
font_02_sfnt_off0001087c.bin
832564b1b8687a2f9528f852b78dee90e227cec4936984aa2b8edad37e7acfec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 17480 bytes

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