Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2dd0d4c4bf4797…

MALICIOUS

PDF

109.3 KB Created: 2021-07-12 22:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 481e16810409f5b407954b341936b6fc SHA-1: e13f739a5749568608fa7931e5081e016335dedf SHA-256: ed2dd0d4c4bf47971a8b7a4a7eda40025400530cd7abfc14038e8f1c5e024aa3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that points to a URL, likely intended to trick the user into visiting a malicious site. While no scripts were directly extracted, the nature of the detection suggests it may leverage embedded JavaScript or other PDF-specific exploits to achieve its malicious goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

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/gPkW7oTCsL0/square?utm_term=acl+ligament+tear+treatment PDF link annotation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92438defa333328aa984f/1625891896975/answers_to_close_up_pics_level_5.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e79b1385664d35b0e3c1a8/1625791252079/to_go_back_on_your_word.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9395b025aa46e30d397b1/1625897307197/jefelijagegorodib.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9391a1b53f2c225f105c/1626117009273/53476376656.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec92867b14134336dde3c7/1626116742316/songs_about_love_and_distance.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDD 10264 bytes
SHA-256: 6db6d0c3299368417351d7ab4f99ef38080d432f011cbd70c8b7bdcbc1337bf6
font_01_sfnt_off000162eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AFD 18072 bytes
SHA-256: ff7cffe70fa37d37d12aa1ab42fe959713729a257a6f303a56851682a58bbaac

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