Malicious PDF — malware analysis report

Static analysis result for SHA-256 04964085a1fd2dea…

MALICIOUS

PDF

79.4 KB Created: 2021-04-14 14:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ee1c3d6a7b40e7a4fc4af3d2967c590 SHA-1: d297153b15c474dca5901120d9fffa49f34116fa SHA-256: 04964085a1fd2deafbc6526a934f2e79e971d48548fabb03e2c73ab6f6bf6ade
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://crophysi.ru/strik?utm_term=j+krishnamurti+tamil+books+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/zetanitanedo/kfhgnjj/22079918926.pdfIn PDF document text
    • http://catsism.com/13583596755uo2zi.pdfIn PDF document text
    • https://cdn.sqhk.co/kojuzipag/GaiejaU/balancing_algebraic_equations_worksheet.pdfIn PDF document text
    • http://winwites.space/concepts_of_biology_mader_3rd_editionemigk.pdfIn PDF document text
    • http://tuimag.ru/6709239090071i8b.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/haPDjd1/forgotten_synonyms_formaldehyde.pdfIn PDF document text
    • http://nashremont.site/vozesozumav7czcz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_81a75ee1f16e432ea764f9c78faa199d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/watajive/samsung_tv_service_mode_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d98233-1132-498d-ab34-216860f28190/89942701899.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_3688ac0952b249ccbb472dd7615ca0dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/ganadejasefejiraluwobege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5bb9d9-0e16-45a3-b249-c20bf200bac9/great_by_choice.pdfIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_423a0f7d58904bf493aa17396648a81a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96884cd7-f04b-482c-abbe-46bf4592ac3f/tuvivugagugerinojapidiwez.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/how_much_do_football_coaches_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9577d135-d249-4ee8-bfe0-72d93fc642ca/starcraft_hd_permanent_adhesive_vinyl_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/punajogeguvekokaruluwaxo.pdfIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_52c20b797c4f4e23a5553632e19f4820.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/tamesobibifujete.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_f0c05fff65354ada95c70671c1e846ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/43936338251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b145fd9-162e-4f28-b28c-744550c59be6/why_wont_my_charter_remote_work.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/46486536283.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_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 5568 bytes
SHA-256: 7cc2ae93033a4fac29a1bb946903af98497867e758fb2e235be2b881830a402f
font_01_sfnt_off000107d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 11072 bytes
SHA-256: ba7be768045173b11f9c1706e335caafcd8f623964b1a115d45d955108e89014

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