Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d68bf2830618e0…

MALICIOUS

PDF

76.1 KB Created: 2021-07-16 03:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b88f07d949f51c6224a3a91dba3eca5b SHA-1: e561eb90972de1499bd8eec2b532c66dea23a94f SHA-256: e8d68bf2830618e04909173fd6c3aaf2a5300f6d0c1ef176dc4f76b907923053
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to a potentially suspicious URL, combined with the PDF structure, suggests it's designed to trick users into visiting a malicious site. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/~3/4Ji06Fp1PxY/square?utm_term=how+to+come+up+with+an+acronym
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc6a23be50f2c5dab4afd/1626195618574/gangtok_sightseeing_places.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee52ce9b1e4d6a360ea01c/1626231502378/the_glades_fountain_of_youth.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e787a6ac38336747ae4b51/1625786278392/certified_pmo_professional.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e885d0f3a1f037b3717061/1625851344943/wemikutedoliba.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e837feed7e630439680ec0/1625831422137/guadalupe_county_appraisal.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0af06e1d16b1a1e4c763f/1626386182472/how_to_get_a_cosigner_off_a_mortgage.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_off0000c956.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC956 16792 bytes
font_01_sfnt_off0000e168.bin
c41cb63da44f8fed17bd74927b4dec8993aed32e131ed1c8183804ce0565c16c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 16468 bytes
font_02_sfnt_off00010c2d.bin
3fe5708c556460037f24b07b0eb614ab3ecf18845c155b5994981156c26f8ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 10716 bytes

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