Malicious PDF — malware analysis report

Static analysis result for SHA-256 706cf15fb43755ca…

MALICIOUS

PDF

94.3 KB Created: 2021-03-17 16:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83341ee4434bac64411868ae113e8230 SHA-1: d62dc43deb440b2d539b8392df36a82c90ad02a8 SHA-256: 706cf15fb43755ca262fb5fdae69b4e0bcef9bb64d2fed41f63a15c0621ffe60
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://vilenefex.ru/123?utm_term=civics+and+economics+sol+study+packet+answers', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to 'Civics and economics sol study packet answers', indicating a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/123?utm_term=civics+and+economics+sol+study+packet+answers
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5fe2be696d614.pdf
    • https://static.s123-cdn-static.com/uploads/4424011/normal_5ff653d72ccd1.pdf
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5fed12381b13a.pdf
    • http://xakerof.22web.org/79040072942.pdf
    • https://cdn-cms.f-static.net/uploads/4416496/normal_5fd3ce779fd0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bogizun.epizy.com/gaxowemeruvej.pdf
    • https://uploads.strikinglycdn.com/files/82eaeb37-4324-4d33-8fbb-2a6bcc5823ce/nitofezurajekotapatu.pdf
    • https://uploads.strikinglycdn.com/files/a5c86c63-0451-419e-a6a0-1def4584b216/how_to_undo_page_break_in_word_2007.pdf
    • http://zugawixiwo.rf.gd/vemuzowonebe.pdf
    • https://uploads.strikinglycdn.com/files/fdd2c308-f866-4381-86fc-3dfece8dbdd0/44717589079.pdf
    • https://uploads.strikinglycdn.com/files/0d3b216e-8397-4a49-9074-c33af3bd7479/85069173781.pdf
    • http://wajalapivibobi.epizy.com/71774022640.pdf
    • https://s3.amazonaws.com/lupebesu/74766406.pdf
    • http://gusozafameximi.epizy.com/48250570867.pdf
    • http://datufubizut.rf.gd/juzunerapowetezupekapit.pdf
    • http://sapifux.epizy.com/environmental_impact_report_negative_declaration.pdf
    • https://uploads.strikinglycdn.com/files/f76f2782-d413-48c2-92be-37b0c4f9a32b/96846346728.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/13234268303.pdf
    • https://uploads.strikinglycdn.com/files/9def08ac-44a2-4947-adf8-59970ae0c938/how_to_treat_pimple_marks_at_home.pdf
    • http://kanabobexodu.epizy.com/80982621882.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001111c.bin
09a73606b1b10e047b49ba26185834add77183e4704e60676f00f7f8391f235b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111C 5440 bytes
font_01_sfnt_off0001239f.bin
ff1c9fec975a437504cfec73b51196c1357f9fdcd302e8541d6e77befa136f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1239F 10772 bytes
font_02_sfnt_off00014835.bin
5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14835 16068 bytes
font_03_sfnt_off00015cda.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDA 4324 bytes

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