Malicious PDF — malware analysis report

Static analysis result for SHA-256 970c66c640ac9c72…

MALICIOUS

PDF

80.5 KB Created: 2021-07-21 22:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 297deb6cc3796877c357f7c110a90714 SHA-1: b9dbf0eab2d9ecc9c1fdc9a1e8aebda5344fa0fb SHA-256: 970c66c640ac9c7222b6ce69f1e0d9dbb931e4bfd9342c7c4e6cb28bf9ceb0f4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs that likely lead to malicious content. The PDF_URI heuristic indicates an external URI was found, suggesting a phishing or redirection attempt. No scripts were extracted from this sample, but the presence of embedded URLs and the high confidence score suggest it is designed to lead the user to a compromised site.

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://feedproxy.google.com/~r/sq/ugae/~3/v-xubMviL4Y/square?utm_term=federal+tax+table+calculator+2020
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f003a93015c64070c9e948/1626342314246/29869513886.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7a938be79d63b81ec8932/1626843448581/what_soothes_the_stomach.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0b78a347a2e2c84f91896/1626388363016/lojobirapufilafa.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f01e214980ba6b3b702976/1626349089690/donemasulekuseser.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f38fbb70ff22042a07bacc/1626574779245/how_to_find_a_lost_tame_ark.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f21c920b17490892011b05/1626479762734/pilamaxewajazozudumel.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f603f255d5113828e46eda/1626735602187/vesefate.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f37edc783e880aac82644b/1626570461059/short_and_long_o_sound_words.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec80a35978cb5ccaaa910a/1626112163572/81110158187.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f206f74b0f882b4d786eaf/1626474231430/beowulf_burton_raffel_sparknotes.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca8ede4ca3800a11b586e/1626122478312/xesekenowumavu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec857cad1bf7105ccc10b6/1626113404104/nearest_guest_house_from_my_location.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1d785bc773b3909147e7c/1626462085495/clear_command_prompt.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_off0000d93f.bin
eefaaf74b292f4aed71fc9e11eb7a10f4c21f29b2b767ae2b47160780c4a9463		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93F 16644 bytes
font_01_sfnt_off0001047c.bin
22b028d9b916b34cd0108bec4195b43ebbe66c2f09c7c265a0be313b7b0580aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 10560 bytes
font_02_sfnt_off00011cbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBD 16792 bytes

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