Malicious PDF — malware analysis report

Static analysis result for SHA-256 e424444c18acafcf…

MALICIOUS

PDF

81.7 KB Created: 2021-07-13 22:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1dfd07f8b5ab50da8e2a0e68bf03a88 SHA-1: 1cd7de4ce2b5b5c9a2ef5620c7131ec1732a5964 SHA-256: e424444c18acafcfb6c830d3117c8ddc88d578330e1458f182cb54b84e240880
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. An external URI was found embedded within the document, which is a common technique for phishing attacks. While no scripts were explicitly extracted, the presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/y83TWYo-3DA/square?utm_term=fancy+dress+beginning+with+a
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e942f7f107ff2467ea0eca/1625899767833/hospital_space_planning_guide.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8c0ae94d7a30e05616c7/1626115082767/factors_affecting_cardiac_output_physiology.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8ed57a6a162676497d88/1626115797176/find_vector_using_magnitude_and_direction.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd43682b498735928be76/1626199095221/i_ran_out_of.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8efe4db8bb141bad72ef0/1625878500181/vugeliton.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e88ca8c7af840defc33301/1625853096890/62108508195.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e770964539ff5689d2535f/1625780374281/tixil.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8f849e370ac6322873d22/1625880649174/anderson_propane_prices.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8c18b4c181567023c2c9b/1625866635543/thestrals_from_harry_potter.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e967182dabf27235566399/1625909016816/lipifilututowape.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9f0e37bfc37e3c235801/1626185486458/sgt_at_arms_responsibilities.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecd48c526e29087384cd75/1626133645116/sinojinireputadaveguf.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e80e17b977dd1475cc14bd/1625820695921/xunitabej.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_off0000de27.bin
3dc078e73aec499a0aff7c4182299a4b0a07914623d67ce9329d4a62ff6523d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 16696 bytes
font_01_sfnt_off0001099d.bin
4dcb809d788ada7ae2b4ff1b4af51802cbfbf663e0b30b007c930a91971a1f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 10800 bytes
font_02_sfnt_off00012253.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12253 16792 bytes

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