Malicious PDF — malware analysis report

Static analysis result for SHA-256 7304c0c2e4ebfc07…

MALICIOUS

PDF

82.0 KB Created: 2021-07-21 14:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5ab66b6a93f480fc134d03ffa2bcf03 SHA-1: 61f6fd13dfde9ea9161432cf34a7166d9f5d5fb1 SHA-256: 7304c0c2e4ebfc07fcdc64d52a24c4c23d09bd9aa2d3c50145cb0674839d18ba
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as malicious and a ML classifier with high confidence. It contains an embedded URI pointing to 'inwebjor.ru', which is likely used for phishing or to download a secondary payload. The PDF structure itself does not contain readable text, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/square?utm_term=the+rough+rider+borderlands+2
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda2e75dd1eb1c290722af/1626186471138/fs20_mobile_free_download.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8017c687a3d659a4d9dd0/1625817468637/genidekelepojazox.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8e3558d864752e01d3dc/1626115637097/words_with_m_as_second_letter.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f6087ffe9d1b5ff7bcd122/1626736767489/basic_accounting_journal_entries.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7fa93f7a034ccb7a3d58/1626111914182/homeopathy_medicine_for_immunity_increase.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f7d8dff217823027a8879a/1626855647962/95498992377.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f70d3713f95c227e4fdedd/1626803511304/loraleliganusuwediwew.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e91045b673687559671655/1625886790155/27992895382.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f7d6561ea6a807ba83649f/1626854998890/rudufadibunivifakelariw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d071c621d519eea60284/1625870449922/54472519534.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f6ce1042134e7f042d61bf/1626787345124/under_the_belt_meaning.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f8086fe97713016fa3c4d4/1626867823084/1015584272.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e86da6939f1c477727397b/1625845158156/pamepixutijajobewapeso.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca78897282d6f4693a552/1626122120354/7033762517.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f377e1e13ee976660a0dfb/1626568673436/simple_subject_exercises.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e93f7518245d33f182acfa/1625898869950/xobelogusizewipapovud.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8316ff9c8b53cea25a49/1626112790891/watch_seed_of_chucky_free_online.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_off0000ded8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 16792 bytes
font_01_sfnt_off0000f6ea.bin
6dd15ad01c7f9e3f823f95d45a092e6f3a7c66c0ae54448f97be3c7d41678674		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 16604 bytes
font_02_sfnt_off00012221.bin
eb1e798b098ba9dcad268229b58da8e222801bb0445bf9443166a7b79fd753b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12221 10752 bytes

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