Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f7f64263bb690d…

MALICIOUS

PDF

94.9 KB Created: 2021-03-27 10:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b3fb61817477b0c6c7efa1348fff2f0d SHA-1: 4ee928d1fa36a8fa6dee52c24d3258b3c36a66e8 SHA-256: 25f7f64263bb690d042c19f1d585d888a956071c122d9f00c7be59c38c576ee8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm for SEO purposes. The primary malicious URL, 'https://dugedepap.ru/wix?keyword=flying+ointment+for+sale', is likely used to distribute further malware or facilitate phishing attacks. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/wix?keyword=flying+ointment+for+sale PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixanarer/34308156908.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_aff91a5c958949c7a006bb031362d53e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/bhojpuri_gane_video_main.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_e67456889c03400ea23123b8306a0ac7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lepefi/dd_3.5_wizard_armor.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/crystal_reports_redistributable_crredist._msi_x86.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_53dba8d20c984ec4b493c5e3140ff441.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuniku/aashiqui_2_audio_naa_songs_free.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_27b84262d56d4e4c9ab839092cbf1f40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuniku/camp_x_ray_ending_song.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_30bba597b0df4ec1a3a8f0e2dc649322.pdf?index=trueIn PDF document text
    • http://bituxezemas.epizy.com/97667629458.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_851c968177194e7a91e280225d44a02a.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_04992f7375cd49018cf211e798a8eb8b.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_15176e0960e44ee2922676917b58105e.pdf?index=trueIn PDF document text
    • https://7322f44d-5cb7-45f5-8521-a79093f6ce74.filesusr.com/ugd/dd0890_13348af93da74bd39dbf988b2b97618a.pdf?index=trueIn PDF document text
    • http://pomigipasa.epizy.com/garmin_oregon_750_vs_750t.pdfIn PDF document text
    • https://0029a690-d003-4268-bdc7-e74daa5a0415.filesusr.com/ugd/a4b355_c9700c19a61641c4bd05f7193db88912.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/83709022642.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_2ce48d1af55e42ae81e345e2912d87dd.pdf?index=trueIn PDF document text
    • https://acda325f-ee3b-40e4-882f-fabc489a6840.filesusr.com/ugd/23b3d3_ba4ef6ee3e9a482a8a05a9abdfd4336c.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FA 5144 bytes
SHA-256: 243cd602b720327ab611521989f0c99ad4ea7208df0fde48cb399923babc3752
font_01_sfnt_off00014679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14679 12356 bytes
SHA-256: 99956f187e7201ecd3510d8440d25b680c3098c215ed199d0e68c4b08894b188

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