Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72bfdfe6060abd0…

MALICIOUS

PDF

78.3 KB Created: 2021-07-14 07:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ee2ee4e2ac88a0418df63cfe28026a5 SHA-1: f4ee13414f3193d7192983d2cc660aa4dbaed5d3 SHA-256: c72bfdfe6060abd087a298666c96def2dff574445c07e007197b75d8b595aa47
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI, 'https://queure.ru/square?utm_term=the+riches+are+in+the+niches', was found embedded within the document, suggesting a phishing or redirection attempt. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8678

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://queure.ru/square?utm_term=the+riches+are+in+the+niches
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e829dfb977dd1475cd3bd8/1625827807537/tubidy_download_music_and_videos.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee4d684d490f6727531cd4/1626230120266/reading_the_last_olympian_fanfic.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8985d3832431b440816c5/1625856093688/afsal_hit_mappila_songs_mp3_free_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3e992485902f3e73706a/1626226329368/7552582212.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee27c6114e6b7b7de55f8c/1626220486206/first_signs_of_c_diff.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec85dc72e2584f246388b8/1626113500393/sexilulamojoxesadajag.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8105ad1bf7105ccb9f74/1626112261756/xiwuzajogadutugi.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_off0000d079.bin
84cc69105a9420ab7b8e41dcd056f79e0609897b1c3b11ab839834157e2c17f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD079 17108 bytes
font_01_sfnt_off0000fd26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 16792 bytes
font_02_sfnt_off0001153d.bin
72278129c5eaa1bc3286587e504be8c3ef4ef3a3ed0423bf96a7b278906532fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1153D 10124 bytes

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