Malicious PDF — malware analysis report

Static analysis result for SHA-256 baebf580a131768c…

MALICIOUS

PDF

77.5 KB Created: 2021-04-29 07:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3d2c56f1571282ef9fa73d35cda267b2 SHA-1: c0a50e60d601e5149e6890cab05f9f98d271f096 SHA-256: baebf580a131768cfd3ebde5169ccf727d4364d6086ecad0edfedd53ff12f558
186 Risk Score

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 0.9997

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://dugedepap.ru/strik?utm_term=stihl+ms180c+maintenance PDF link annotation
    • https://cdn.sqhk.co/gusisitixinu/dgeggPX/formulaire_dsi_2018_notice.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/4jcFh8t/52702892070.pdfIn PDF document text
    • http://cucoupon.info/34308928375156f5.pdfIn PDF document text
    • http://all-system7.xyz/desierto_drive_mexican_dreamgo1v1.pdfIn PDF document text
    • http://stavki-na-sport.site/119283156479lj60.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/diledowigi.pdfIn PDF document text
    • https://zadukali.weebly.com/uploads/1/3/5/3/135340438/99e3b39bb.pdfIn PDF document text
    • http://love-cosmetics.shop/prueba_de_absorcion_atomica96wpn.pdfIn PDF document text
    • http://jushq.club/ht-ct370_firmware_updateqwgzu.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/cicigm0/79182081954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_5045c42f8e594e9ca2de0d8c1a5522ce.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_2539246553224d9fa5eaf5f412f2f6b5.pdf?index=trueIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_924891abfd8f49b989ad310f50961186.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/fuel_expense_excel_template.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_512229f32c3a42e4997de1b1b3008977.pdf?index=trueIn PDF document text
    • https://00f02ae0-031c-4cf4-85c3-86bbc6d7deb2.filesusr.com/ugd/13f2e4_ce502a27400646a5acbcc4a52996b514.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_d7a4d766385a4a2f982e9c5d12cd0987.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/what_is_linear_stage.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_d5266bc2db65430ebfd97b5f02c6e49d.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_c1a65a1f63b342578d9c05fbef9b1cd4.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_1c2aa74fbdb042fd8f88ee7e7cd8d10b.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_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 5432 bytes
SHA-256: e9ac79f23f0b197426c131e8884df0af4d8020649f6d39fb874f6ace84a6fde1
font_01_sfnt_off0000fc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC70 12648 bytes
SHA-256: a01941fc068313d2946f5c22ce77fc51d26a63e84a3a2c4a6537f1ece4dac655