Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca088b85870ba20…

MALICIOUS

PDF

96.4 KB Created: 2021-03-28 19:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dc5c64e7583aa9a41f2827e67dde7e5 SHA-1: 74bd41ee0d97009d6a56388e0bb6bed5bbe9dfa9 SHA-256: fca088b85870ba203e17100a1ed02f5df712380c82b339d8c1250df416d5d5aa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URI pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness. The presence of an external URI suggests an attempt to redirect the user to a potentially malicious site for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/award?keyword=laminas+perspectiva+caballera+pdf
    • https://static.s123-cdn-static.com/uploads/4477655/normal_6008c2159d0b8.pdf
    • https://cdn-cms.f-static.net/uploads/4485448/normal_6047d3ab0cb0c.pdf
    • https://static.s123-cdn-static.com/uploads/4367303/normal_5fed789ca9e59.pdf
    • http://pedaxofanor.mywebcommunity.org/80262503553.pdf
    • https://cdn-cms.f-static.net/uploads/4483361/normal_5fdb9b4f26836.pdf
    • https://static.s123-cdn-static.com/uploads/4481516/normal_5ffe962543535.pdf
    • https://cdn-cms.f-static.net/uploads/4373004/normal_603d08fdd4890.pdf
    • http://rolorutebu.sportsontheweb.net/gesajoged.pdf
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5ffd28c11dc83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wajufifenoxuj/47322294356.pdf
    • https://s3.amazonaws.com/remufuzu/pest_pestle_analysis_templates.pdf
    • https://s3.amazonaws.com/jawusawar/xepopajokozotaz.pdf
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_cd725400fcf0485a9b82b223c12566f9.pdf?index=true
    • https://s3.amazonaws.com/wupiwupiwot/tuvulefu.pdf
    • https://s3.amazonaws.com/wenobagupexekap/48889999598.pdf
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_49370e37b4c943039434b53581e8d6b3.pdf?index=true
    • http://fuxuxasezid.atwebpages.com/biochemical_test_for_bacteria.pdf
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_e7a4ad64beaa47dda12de0199a1de838.pdf?index=true
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c13.bin
8dc1826bacae93a372716af9e517ef5c3a4347d035fd701c8d306d45d92f71ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 5120 bytes
font_01_sfnt_off00011d51.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D51 1800 bytes
font_02_sfnt_off000125e1.bin
4d1ea5fa9886a4abc9d66b08b2c9a1f8221172a2131abfcb2ba313f563278c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125E1 12204 bytes
font_03_sfnt_off00014e41.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E41 16204 bytes
font_04_sfnt_off0001636f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1636F 4324 bytes

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