Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f358ccfaec75c1…

MALICIOUS

PDF

74.8 KB Created: 2021-04-21 12:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a027f9a3a7ff3267039aee91412265f5 SHA-1: 54a1d68b533a4438382ba7b28729f5d49d7c3ca0 SHA-256: 35f358ccfaec75c13fe3f1cf1c7dcff695b0840960d51849926b28fb503963a2
156 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 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.
  • 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://dafemum.ru/strik?utm_term=what+are+the+elements+of+cinematography PDF link annotation
    • https://kipuxemoxux.weebly.com/uploads/1/3/4/6/134616309/migevunifi.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/623cdc.pdfIn PDF document text
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/delejisazaredo-kuraj-votezopef.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/naloroxesovas.pdfIn PDF document text
    • https://zebepinexorusog.weebly.com/uploads/1/3/2/6/132695607/96f16ea6f1636be.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/mogulop.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/lufumowaluruna.pdfIn PDF document text
    • https://tibusikexotojuf.weebly.com/uploads/1/3/4/0/134012355/lotufifuris-misidija-zuvari.pdfIn PDF document text
    • https://seniwotod.weebly.com/uploads/1/3/5/3/135346371/27ef2c7d0c14d.pdfIn PDF document text
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/vaviwinilolagenu.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/8e489b6f12ec16.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/b00e90b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_67f22b4499584ac6b51a8c19a936490c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemupajese/80044018298.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/norton_anthology_of_american_literature_9th_edition_volume_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/metformina_850_mg_in_english.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_c4546b43efdb40bcbbbc203ee32f0fd0.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_a7a6567187b14120a24fc6c97210b0eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/when_nietzsche_wept_trailer_ita.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_f6df4be32a7c435ba1c991f6493f0126.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/plant_and_animal_cell_functions_worksheet.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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 5544 bytes
SHA-256: 03163766c08b16336b4507cd2798548fd53a703fb2005a44281c32fd675db84b
font_01_sfnt_off0000f9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 10680 bytes
SHA-256: 19fcf44475fe24896f57429cd8f9017c4713e7a1b78ecb8ce31f8733f6eaad5c

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