Malicious PDF — malware analysis report

Static analysis result for SHA-256 8984ec854ad262f2…

MALICIOUS

PDF

79.3 KB Created: 2021-07-17 05:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba0968ff42eeac2202889d53e4d70b5b SHA-1: 21a4ce170682f969d4ce7d490e7dbc8590151717 SHA-256: 8984ec854ad262f296639128dc4fd61179d2ea6c2e5f8926273320e4631d7adf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to external resources. The PDF structure and heuristics indicate it's likely a phishing lure or a dropper for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9031

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/iXsW93xxTQA/square?utm_term=domain+model+made+functional
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c6aa684b4e19c9c6505e/1625867946797/mulidosom.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7b7c77e45264421f6e17b/1625798599953/givuza.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec789d7e2b6271615a4f7e/1626110110118/mabumiwinanidupupabug.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f085e6e6f7040436464eca/1626375654856/what_conditions_do_mangroves_need_to_grow.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1005b46c0d74f87dd1ff4/1626407003543/colleague_performance_review_examples.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee720ee9cbfe6c2feb22e9/1626239502523/history_of_physical_education_in_ancient_greece.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f174344bb49071de1cb793/1626436660989/lejagepagogedirak.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_off0000d603.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD603 16792 bytes
font_01_sfnt_off0000ee15.bin
131726c369ebf29e3450dd3941e3cac4fcf14415cac477f6c9dcb5e22867e930		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 16608 bytes
font_02_sfnt_off0001194f.bin
ded1d913825479c2f85ff6ef5d69bd73c42d9aba193554fef40cddfb5bb9da88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 10468 bytes

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