Malicious PDF — malware analysis report

Static analysis result for SHA-256 8474352213965a74…

MALICIOUS

PDF

79.6 KB Created: 2021-04-04 23:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 65456a8324b32c2c0e327e967549b045 SHA-1: 584eb0e5517fcb860ddd7ef3c8154e81098c56fd SHA-256: 8474352213965a74ebfcdcb3dddaf9c6d911cd81d36582ede262558309c945d9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=what+is+in+a+sonic+lemon+berry+slush PDF link annotation
    • http://nuveclovet.xyz/suxoguwoxikf56l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_6036099b0fbd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_6038e3d3c907b.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/ib9Ejbi/mind_map_free_template_word.pdfIn PDF document text
    • http://erkutungotu.com/server_2016_remote_desktop_services_manager_missingukuy4.pdfIn PDF document text
    • http://plafond.xyz/47359215178n99sc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_5fed73ca233c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_5fe5e98d25cb5.pdfIn PDF document text
    • http://prostotit.site/23974419569lw96j.pdfIn PDF document text
    • http://detonic-hypertonie.website/6519745334crvi8.pdfIn PDF document text
    • https://cdn.sqhk.co/nofatazor/3ifiiif/sanivisibesodeniwin.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/jiidGie/matukuwogofowupesuniw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/100f6799-3392-4c4e-a409-0de141490c7a/what_channel_is_bounce_on_xfinity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6d81ac-d4cb-4e41-9c6b-08e285c42a88/39055671074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b4e57d-e89f-4e59-b4a3-d1087691bec9/magic_bullet_mb1001c_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35de18e-d607-49c0-8e68-f23c2718196c/what_does_error_e03_mean_on_a_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4661dc9-79b7-49f0-a037-cc7711d85a1e/72423173845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a453605-1fe3-4f0c-a484-76f3d2e6f155/is_ps4_vr_ready.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bb001f-364b-403f-9ad9-6277752f763e/kokofexuwetudoluzebupunas.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/30748216005.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/the_young_elites_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2f5b83-2b2a-44bf-bade-694e719a4dd1/14995363884.pdfIn 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_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 5292 bytes
SHA-256: cbce8a2b6df476044b60d2b93d06dc84d4adf9acc4f9ccdcebb6deca541a50b9
font_01_sfnt_off0001079c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 12020 bytes
SHA-256: e04fc80025520bc01eb00bb9bbd31659c114afcf298d36965106af721e1d2698

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