Malicious PDF — malware analysis report

Static analysis result for SHA-256 05819612c6005674…

MALICIOUS

PDF

86.7 KB Created: 2021-04-04 06:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: abea92312b66c721b7fe28a1c17389a8 SHA-1: d4006e476dd7aba6a8ae0ffdbb3c82d5cab66484 SHA-256: 05819612c600567439bfab687aae158d84c134df8b28b9166bcb56195e1e12c2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL, 'https://jumiwimov.ru/strik?utm_term=what+personality+type+is+bakugou', appears to be a phishing lure disguised as a search result. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=what+personality+type+is+bakugou PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5fee46043866a.pdfIn PDF document text
    • http://werojati.getenjoyment.net/calendar_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416332/normal_5fff067a261ee.pdfIn PDF document text
    • http://katipef.medianewsonline.com/early_literacy_skills.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416787/normal_5ff342ff7a86f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405922/normal_5fff4b454d452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_a3208699e0114a38b6c9bfea638f429e.pdf?index=trueIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_30319fa16a954772ad5ca9af03554bc8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d003ef-c266-471f-ae69-5a33d8bbba29/how_much_is_a_honda_eu2000i_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4890cf66-2429-4e15-b214-afe5d155ec6f/advanced_class_origins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b728ca41-eaf9-4ff1-8140-4c4be2f8a9ac/modelo_atomico_de_sommerfeld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/735acc2c-c1c1-4509-a459-038331c189ee/how_much_space_does_30000_btu_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef52812-c93e-4196-ace4-c24d26048629/vuxirotator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac4ddd8-bc12-46d7-87c0-00d5ee8e75c0/html_and_css_design_and_build_websites_kindle.pdfIn PDF document text
    • https://62619d47-812b-4c4f-a232-aa08d86264e8.filesusr.com/ugd/6d62c1_91d4ff36f848455b9dec44d172a03a7d.pdf?index=trueIn PDF document text
    • http://jitawidavez.atwebpages.com/8600107853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0e5881-8b54-4a62-9f56-91c7badd9b6f/how_to_open_an_hp_probook_4520s.pdfIn PDF document text
    • https://beb587af-1766-4a1c-893d-8c04a9882fa7.filesusr.com/ugd/f3bec4_88eac653759646de80d995787a8735d6.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_a118e70864a84b07ae716297ac89d4ba.pdf?index=trueIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_02f7b0d76c214d9fbdbbe4db526994b1.pdf?index=trueIn PDF document text
    • https://fafbc8e2-abe2-46cb-a6a3-4b44b5c784c5.filesusr.com/ugd/b0b521_732b63f2b1b94f34bcdc800cc32fe923.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27de839e-85c5-4d3d-877f-9f4cd9b86aa8/jivinel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10791 5280 bytes
SHA-256: b4e363c0571d56abc1ef8ab30f2ba966bf2844f7a7daa6c0b68ac5b3f8d569ff
font_01_sfnt_off00011990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11990 11084 bytes
SHA-256: 90d9a095a1c247f05f84f9a511345bdf5d2fd13371430bded89b405a81772ede
font_02_sfnt_off00013f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F89 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.