Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e16a575987cdc72…

MALICIOUS

PDF

73.3 KB Created: 2021-05-23 15:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5bde01e3d3ac494077834043484fbc9d SHA-1: 5d7d9e9393860a894fea66b5d306e20b0198df43 SHA-256: 9e16a575987cdc72e838de63271ffdd3c0ad0d0cccb9f833e65a45508e53b76d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://seumenha.ru/strik?utm_term=how+to+wrap+up+a+cord PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6010a8c935ac8.pdfIn PDF document text
    • https://baxawomegofagu.weebly.com/uploads/1/3/2/8/132815114/9382522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366620/normal_5ff5d0ba2ceef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5ffc9c4aa2456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_60269a27d8992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd8185722124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_601920d33c17c.pdfIn PDF document text
    • https://xolejapu.weebly.com/uploads/1/3/4/4/134491856/zasodezekakujul_kumegeva_nefomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fd11e7de6e3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495526/normal_5fde92fb35f10.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/ad313458-0641-4920-866a-26058b4cc04f/american_buffalo_book_joe_rogan.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/what_are_the_4_types_of_database.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdf0359-1eab-4caa-9db6-9b94b8597544/sql_server_2016_reporting_services_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fa8cbc-8194-4834-a5eb-e8dd6779ecbc/tawekosumira.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/how_to_use_a_marathon_wr50m_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1acb4d11-8cac-45d2-bf46-7f0906e85811/3208744353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0d082b-3b1d-46ae-b51d-888418d62af3/32763560995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a3372e-610e-4384-8ebb-4fd7d7f5a370/hayward_salt_cell_940.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bebapoxurajeretadopudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017af8d9-6f84-4b39-a297-588968374e1b/types_of_camera_shots_and_angles.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/anth_south_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/giving_tree_tags_template.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_off0000e134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 4912 bytes
SHA-256: 5c122944ff6c23e86867fed9c840b4dc375bf726e87c634d44e50ec393d82e26
font_01_sfnt_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 10748 bytes
SHA-256: a12f7ba81dfbda08d472dbc4cd84b2b6c7d979b4428b5611cce0da45c3b1f492

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