Malicious PDF — malware analysis report

Static analysis result for SHA-256 190bed2aad4e9c39…

MALICIOUS

PDF

80.3 KB Created: 2021-06-06 10:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8b79c0c700c9bf8abe58457d7546834 SHA-1: a5331625bf818a17b9b61d2c7a3b5092045170fc SHA-256: 190bed2aad4e9c3930e8e870e68d76075810c2399fe31b6087e0e10e600b50d3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9984

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 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://coretry.ru/pbw?utm_term=how+to+find+effective+interest+rate+compounded+quarterly PDF link annotation
    • https://guzaluvezitalil.weebly.com/uploads/1/3/4/6/134645516/dotevolukagu.pdfIn PDF document text
    • https://zojunakalej.weebly.com/uploads/1/3/2/6/132682915/nudafunelezetez_wudesisujok_dofofabilepu_komego.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/f25b92.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/pisabokad.pdfIn PDF document text
    • https://jinunogafexaxim.weebly.com/uploads/1/3/4/8/134884933/wubazelavoni.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
    • http://sukagafamo.pbworks.com/w/file/fetch/144626607/paxevugumemowaxuxid.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/fybsc_physics_textbook.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/f/how_common_is_myelodysplastic_syndrome.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/86756844965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd0fd03-56ad-4b41-ad07-faa2d924ee7f/chemical_composition_of_olive_oil.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/f/what_is_the_economic_outlook_for_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d775b6-8213-48b8-b6f3-9f5c5eb7adeb/ludividenogedunib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8043547-3e89-4e2f-84e1-ad1527ccc8ae/3835378963.pdfIn PDF document text
    • http://ririgifavem.pbworks.com/f/aprendizajes_clave_para_educacion_preescolar.pdfIn PDF document text
    • http://povelin.pbworks.com/w/file/fetch/144423357/engineering_drawing_text_book.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/f/nitotu.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/w/file/fetch/144686388/53732146865.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144660930/16589570750.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/wo_ladki_nahi_zindagi_hai_meri_song_download_mp3_bestwap.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144602322/valentina_matviyenko_biografia.pdfIn PDF document text
    • http://kunixove.pbworks.com/w/file/fetch/144483747/is_there_a_problem_with_yahoo_mail_tonight.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144527448/97438467682.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 5524 bytes
SHA-256: 65c38bfc8d207b5127067cf23bb3f33e461398afec1bd1309e56dc7882f2ece6
font_01_sfnt_off000106bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BF 10928 bytes
SHA-256: f4df6b0f8fb82d4bbf615ff3eea2a3e35ad0cdc65777a4c5962ee2fb0455e947
font_02_sfnt_off00012bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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