Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6e6b2c37ea1104…

MALICIOUS

PDF

353.2 KB Created: 2021-04-05 08:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eebce4ccee4cda3ae0cab9fcda66dcb6 SHA-1: 7a61e08a7020d13932b086f72018a07e341b8d78 SHA-256: ab6e6b2c37ea1104b6abba722390a2bf8d235ac14a1bfd5df568f5ed9df91a1c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/wix?keyword=bill+hamon+pdf
    • http://maykistore.ru/heaven_comes_to_earth_scripturek5a8o.pdf
    • http://kieverts.xyz/the_wave_function_for_a_particle_must_be_normalizable_in_a_given_region_becausezn96j.pdf
    • http://chebsvet.ru/97859018226osa1h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_3d859b81e39443a8b01129ea30c12cf7.pdf?index=true
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_f124175674744a0f8400f3c3c1fabfd4.pdf?index=true
    • https://s3.amazonaws.com/tobito/how_to_get_psa_marriage_certificate_in_singapore.pdf
    • https://uploads.strikinglycdn.com/files/90f3be0e-52a1-490e-98d1-fa1ede5c7ce2/502426882.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/41573726312.pdf
    • https://s3.amazonaws.com/moduluzuxikari/irs_charitable_contributions_form_2017.pdf
    • https://uploads.strikinglycdn.com/files/c782b431-2881-4f09-bb98-ba769bf7f676/netgear_wndr3800_n600.pdf
    • https://s3.amazonaws.com/nowokil/11657800787.pdf
    • https://s3.amazonaws.com/pasawexawinogad/90739489869.pdf
    • https://s3.amazonaws.com/rowubunak/27637979335.pdf
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_635abeef44024a8eb6126bd9e1e309e6.pdf?index=true
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_1ff59d709ae14880976edeb440c3d254.pdf?index=true
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_5531d8e895c74efd804bd9b8bef7b5a9.pdf?index=true
    • https://s3.amazonaws.com/dinisemowoge/automotive_lighting_design.pdf
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_51e0e51aa870418cb30d95797c2c9cbe.pdf?index=true
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_13c7e1e7d1c04ce782370e9bfbb0a8f3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052622.bin
bbd59358b5e933263ca9b1dfecf89bf893d32bb01466a980ad9a26791c102a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52622 5056 bytes
font_01_sfnt_off00053734.bin
95e83291df57f591af9bb351f366a5f47a1cacb58b2de3a36b786b5e2a754719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53734 12196 bytes
font_02_sfnt_off00055fbb.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FBB 16204 bytes

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