Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eae5b4c28479a29…

MALICIOUS

PDF

64.0 KB Created: 2021-05-17 09:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d47b30a23cca0d0583862474fa77350 SHA-1: a073bc943f8dc82e449a6429255ce4b272b7031a SHA-256: 5eae5b4c28479a292b30655280b00c3a43ea4717d62aefa5d5619b397c9a1faa
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9722

Heuristics 5

  • 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
  • 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=%25E2%259D%258F+web+services+description+language+%2528wsdl%2529 PDF link annotation
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/bf78adea9f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_6052e2880bbcf.pdfIn PDF document text
    • https://dibevoxatatot.weebly.com/uploads/1/3/1/1/131164568/6882444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_6013d8626ac2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fd8f959cecec.pdfIn PDF document text
    • https://bapidovomefizeb.weebly.com/uploads/1/3/4/3/134382768/gubaj-fogar-totapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fef187a1860d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496616/normal_5fe29d969b746.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/wegelojuzojesafobulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_60675b5b9a481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423443/normal_5fe49e28e99a1.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/52b9cd8d-67f2-40e8-a09a-0b6e2a6c7fd4/gupiwojubibowumu.pdfIn PDF document text
    • http://zodumuf.rf.gd/john_ortberg_the_me_i_want_to_be_dvd.pdfIn PDF document text
    • http://vajonaz.epizy.com/90958574163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71289bd4-555a-4695-969e-7b7f7d2668e7/75632267680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e733b6e-7773-4231-8d4d-926914ce9d32/i_am_that_nisargadatta_maharaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7911c15-bfb0-4007-a05c-0e8fe9db1536/washington_dc_map_monuments_and_memorials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ff3390-fb62-4893-a5e1-298c00b06d87/40659794142.pdfIn PDF document text
    • http://govezijatin.rf.gd/atlas_de_carreteras_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bf994c-e29e-4325-b20f-e2fea4c14f7a/81161764856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae6d98e-3be1-408e-984a-3a0768abed2b/warakulepekado.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 5592 bytes
SHA-256: e7803ea8c12aca80a251aa747de5882a4d3b73ac3897ee0750e17d68aa32bb37

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