Malicious PDF — malware analysis report

Static analysis result for SHA-256 2558f5c55f0c4126…

MALICIOUS

PDF

74.1 KB Created: 2021-06-03 10:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e841b6519ffae1a1ee14a88bc87f0eab SHA-1: b66153bfb543b3218fefda25a879d63929fc0994 SHA-256: 2558f5c55f0c412606b1a534296896c20a45ac7c8d24e096a5d2bf5a19748fc4
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 0.9995

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://infrive.ru/pbw?utm_term=download+conjuring+2+full+movie+in+hindi+hd+1080p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449192/normal_603ad390c124b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_605b5fa0c4b01.pdfIn PDF document text
    • https://pewenotevis.weebly.com/uploads/1/3/4/5/134597539/venutodez_nizabuzave_tadevapaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5ff659d45e1b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_60501e87d8133.pdfIn PDF document text
    • https://tewenamizudeko.weebly.com/uploads/1/3/0/8/130873709/dobodejotojof-javilukizanuge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nubuzefi.pbworks.com/f/88537217755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafa6f26-d63a-421b-beb6-529c9e5e3db2/86033039433.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/kobugo.pdfIn PDF document text
    • http://jevibufile.pbworks.com/w/file/fetch/144543435/8849625578.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144424371/solving_quadratic_equations_practice_worksheet_answers.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/17177832738.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/bakeragokudijipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf855f7d-ccb0-4fff-8fc4-33b0f839eb4c/dipigara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce66c09d-d2c7-4541-80e7-20fa5ea0b514/dajezinajarog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db03809-8f95-47b4-ac05-c66c97ba4cda/19228572982.pdfIn PDF document text
    • http://natizasex.pbworks.com/f/business_proposal_sample_docx.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/rbse_class_12_chemistry_notes_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b341b4b-056d-4451-86c0-46b1264519b8/nuvolimitimokotusarorovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1153b9f-dc10-4903-a105-a180dfd5fcee/descargar_driver_de_sonido_para_windows_xp_32_bits.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/w/file/fetch/144523737/72125783736.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144436476/57051055593.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_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 6136 bytes
SHA-256: a3d490db1c5c12384da36e07220aa8c4fce62e933f8bba6c9e5a6e89fcc9558e
font_01_sfnt_off0000f652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF652 10660 bytes
SHA-256: a32c477f87f40da70dceffdc7d82703e15bc7be3571d8cda3f5440719d59155a

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