Malicious PDF — malware analysis report

Static analysis result for SHA-256 9481c03de6e827a5…

MALICIOUS

PDF

76.8 KB Created: 2021-07-15 19:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58d82ca0b913e683b95528e35a7cdda3 SHA-1: bf060a826cb1c8d7064edb49c7929e170ecd0979 SHA-256: 9481c03de6e827a55796e7d29ae8925b05eee70ed8b15fd5d2611d624f63360d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an embedded URL pointing to 'irlanc.ru', which is likely used to deliver a malicious payload or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://irlanc.ru/square?utm_term=elegant+nails+and+spa+near+me
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edb344b564270cd6eb441d/1626190660896/scanned_image_to_word_converter.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f05d126e01a54b0d2a6947/1626365202476/medileba.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f03e4134f25751eec5c54f/1626357313561/30768793660.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed89544182611181b7efd2/1626179924880/xatebul.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee900f27fa864c7d15fb04/1626247183581/ids_and_ips_solutions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ff433f195e1e4034f157/1625882435975/84641984748.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed92c36bb85f4a8d88e97d/1626182339277/what_is_the_difference_between_inductive_and_deductive_method.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7cfb402743737595bdc0/1626111227316/nedobopituvagijo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92627787dde1a90ae2557/1625892391155/84047754013.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_off0000c9c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C5 16792 bytes
font_01_sfnt_off0000e1d7.bin
4e15cf789fe121a039e6e8b590739d615dd0722b331e875d8bb4d16b5cbd6847
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 16824 bytes
font_02_sfnt_off00010dcb.bin
d67a329f2b090a7a2b3436cdbc246f9c0343a6c4f05b5a4eb5e5654164cac880
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 10596 bytes