Malicious PDF — malware analysis report

Static analysis result for SHA-256 313540251478f615…

MALICIOUS

PDF

79.7 KB Created: 2021-07-13 01:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2478c6cca2a6ae6deea243aa9e79d50d SHA-1: 3d8cf7e43a80df412da8c46d14e1ce0f0e7f221a SHA-256: 313540251478f61585e278a8dae8be403804c61e11a66802a2cb54a53e1a68c2
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, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is a feedproxy URL that redirects to a PDF file. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to deliver a malicious payload or phish for credentials. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/WVKuihPcy9U/square?utm_term=drawing+with+the+right+side+of+your+brain+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e908aee370ac63228812eb/1625884846591/posimuxisezax.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca6cd704a383bbedcf3ba/1626121933182/78197109111.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e893707b4b53268335b79d/1625854832155/things_beginning_with_x_in_the_house.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecb6a1e70f5f3535de639b/1626125985707/how_long_can_i_keep_cooked_rice_in_fridge.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecbdcac6505401f353bc8a/1626127818293/46426740125.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e80d2925441e1b3787e4c0/1625820458021/2012_nissan_pathfinder_owners_manual.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7aaea1d61f435cef54b6e/1625795306246/factoring_trinomials_x2_bx_c_worksheet_answers.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_off0000d248.bin
60647576d2a8a31466c5f558b436d45c412dbdfcc762c4d60d439dfdc9f820c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD248 11172 bytes
font_01_sfnt_off0000ebfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 16792 bytes
font_02_sfnt_off00010410.bin
9510c5b1c06a46c48635666fdf0582ae2fd354c9a6f6f242f7b51bd964cc6393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 17016 bytes

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