Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95930eb55ca01ec…

MALICIOUS

PDF

80.0 KB Created: 2021-05-29 06:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: deae9ba82f10fb85ca2384e6d74808ca SHA-1: 159235c71fcc5a4156ffa9746808f5e906b557e5 SHA-256: e95930eb55ca01ec6f104770fb991107f01072bfbac49120384f5f2e95a15cab
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 0.9994

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://xezojetit.ru/strik?utm_term=usaf+epr+bullets+covid PDF link annotation
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/f32e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_604051e95f1e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380403/normal_5ffd2daa09ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_6023cd880acdc.pdfIn PDF document text
    • https://wirafoxojobukof.weebly.com/uploads/1/3/4/6/134608935/9618349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5fd06312aa6d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_602dc6c11287a.pdfIn PDF document text
    • https://kilekefaze.weebly.com/uploads/1/3/4/6/134631798/duwovuja.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/9412399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_6041ca6c79b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5fda2d34e4d77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471083/normal_5fff7d8894bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_606e8285da313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_600a738be7d0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fc610d144e98.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/1049b46e-ad80-4aad-ba69-bd7f4d77f64f/10588972602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcb3e7a-8136-4d9e-a6d0-9aecec33e71f/kakupimez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84382554-3b6f-45e5-9125-8dfb6da9d7cc/73158917774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33345a2a-a79d-41a6-8c11-aa15f8157236/allen_bradley_powerflex_525_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a475ad-874a-486e-9541-c46f74b07111/windows_server_2012_r2_datacenter_iso_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dce4e78-8bbc-4dda-9388-1c7ca44d1983/economics_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0badaa-d7e8-4e46-82a6-3a6d26dbc321/quotes_from_one_of_us_is_lying_with_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925923be-20a2-4d26-bdb0-53009b1ac1cb/how_do_i_get_the_old_version_of_instagram_on_my_iphone.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_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 5340 bytes
SHA-256: 7d4cfdcf89c87f0d8297dd07dbd0a782a44112b47c271bfbba64e77d53c67f5a
font_01_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 11168 bytes
SHA-256: eb884958190bf90f2d811360a39fa30d5381c6cbfdf175d1e488f2765b2f4a1d

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