Malicious PDF — malware analysis report

Static analysis result for SHA-256 f953d0665be1859c…

MALICIOUS

PDF

92.4 KB Created: 2021-07-16 18:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 689f3807772579f7f652a8c83432d915 SHA-1: 898e396cd11db6d520562fc2bc46661f5f63b57f SHA-256: f953d0665be1859cbd93411a4b4c29048ab0c5b55ba4ffa0028fd9cc1bf975fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. The PDF contains embedded URLs, one of which is associated with a phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it is designed to redirect the user to malicious content, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5781

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/ZFaGRQ6RLlg/square?utm_term=fire+code+of+the+philippines+2008
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94b520cbdad4d35070d69/1625901906739/reading_passage_with_fill_in_the_blanks.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f05d4ee481773adf18e5d1/1626365262286/duzeporivir.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edea45d6ef6771c1dd4868/1626204742038/black_to_blue_fade_hair.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5b78bb85ab7f02bedb1d/1626233720372/fejosisokubak.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_off00010898.bin
b94a68ad2eb556961b64452f41793b027db288dc530c569d372a92c068755fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 10980 bytes
font_01_sfnt_off000121fd.bin
ce3d44c75664714146001c2d9ecd5986cbca2aadcc47b46fe930028489f75688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121FD 16744 bytes
font_02_sfnt_off00014dd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD9 16792 bytes

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