Malicious PDF — malware analysis report

Static analysis result for SHA-256 5507f94fcbf4b3cd…

MALICIOUS

PDF

80.4 KB Created: 2021-07-15 15:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 933a95400bdc07adc61ecd9fadd9d94f SHA-1: 483353e73bf705dd57fc110bbbbf43b7b0023913 SHA-256: 5507f94fcbf4b3cdc175e51110a55aa68a79329c416831fc0bf000af49e97c6a
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 embedded URLs, even if some are confirmed benign, suggests an attempt to redirect users. The PDF structure and heuristic firings point towards a phishing or exploit delivery mechanism.

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/eaN1Eb74jJI/square?utm_term=how+long+does+it+take+to+become+lucky+friends+in+pokemon+go
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecaaa1f9183728738a849f/1626122913227/33076303665.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee400c0a53c127f5d8d81b/1626226700197/58293987661.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd0d1d6548a387fd1bb40/1626198225923/gk_questions_for_small_child.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8cd236ee212f66cf30c3/1626115283058/feedback_control_of_dynamic_systems_solutions_manual_chapter_3.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec80d67726b430b467fdea/1626112214270/rovajeravepak.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee383033d4654651bd282e/1626224688485/56381579766.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e89abd4f7f922498901eb4/1625856701441/xifivarojewit.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_off0000d42f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD42F 16792 bytes
font_01_sfnt_off0000ec41.bin
1b60c1c10077cd8db474babd99b9239783d05e5f29e596a408957ae71fa97a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 17524 bytes
font_02_sfnt_off00011a25.bin
3e3c89ef0ca083fc71cd3c7bad2282076b2ae53045962e1c7e06caabe1e7727e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 11484 bytes

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