Malicious PDF — malware analysis report

Static analysis result for SHA-256 a179d1822aecf9e3…

MALICIOUS

PDF

78.0 KB Created: 2021-07-12 21:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e682fbda4587e2a39d06274b0f323b2 SHA-1: b7bd76323b5853aaf72bfb30fa45fe57f1b47daa SHA-256: a179d1822aecf9e3af019d29e478190cf79b62ac648d912127a8abc94f055fb4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of a visual download button suggests a lure to trick the user into downloading a secondary payload. While no scripts were extracted, the overall indicators point to a phishing attempt designed to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aauXj3bnHUA/square?utm_term=food+delivery+near+ne
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8bda137c4677c34614ba0/1625865633163/kapopojufemunomijibokug.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8adf19a16f038d633eda/1626114783351/my_clipboard_on_this_phone.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec804d12c1416d2f1a7fc1/1626112077935/wosumiliritikagemeb.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7f31ad1bf7105ccb71b4/1626111793232/wivetivo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8ad57a1add4dee2038ee/1626114773285/dry_saturated_steam_table.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e929680cbdad4d35061f96/1625893224878/a_song_of_kabir_translated_by_tagore_summary.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e84c38f518dd358f68984d/1625836600373/sheeps_heart_labeled.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9483058c6623f03838f53/1625901104241/the_ugly_vegetables_activities.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e7d08915684aa53a28d0/1625876432842/pre_experimental_research_definition.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e853bf60b06e02cfcf7cb2/1625838527554/tucson_to_guaymas.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_off0000d333.bin
213986ee21c6b8c3362c4b0098b407f475ae894284f82b382e6cdb399385cd8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 16216 bytes
font_01_sfnt_off0000fd37.bin
4b1b4f37bfb375d8d8dc588094c76beb8c671dcfef68e31057328dc92a671705		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD37 10132 bytes
font_02_sfnt_off000113e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 16792 bytes

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