Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9de9118431249a…

MALICIOUS

PDF

84.6 KB Created: 2021-03-24 17:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e616d9e983c7088cebabf4a26b90328 SHA-1: 908ac2babc2548be532ccafd2e1ba0c03ce8ea2f SHA-256: 5b9de9118431249a7ce23cee1d2623df13a0561826e0c0dd2a9c745f9490cf71
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 0.9998

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://jumiwimov.ru/123?utm_term=edible+food+packaging+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458389/normal_5ff12366aa8ee.pdfIn PDF document text
    • http://goxuvux.22web.org/elective_home_education_guidelines_for_local_authorities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419630/normal_5fdc16b2a7c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_604aae71a3eca.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/aXkejb0/lutekavukulip.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/3GtEF1v/wsdot_cameras_spokane.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5ff450a6746fc.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/65850290-ff4b-4c67-83b3-9c1c9e55a517/resogifafajexazuj.pdfIn PDF document text
    • http://baxujaxifibew.rf.gd/84964043385.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/flying_android_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/free_for_to_excel_converter.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_121aa864e41243aaab19abe422a50858.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2974cc-67f3-40ec-b027-2d714f6401ee/how_to_animate_procreate_pocket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed04bf0f-162c-4bfc-a11e-1bda4576d185/9182768257.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/irobot_roomba_670_good_guys.pdfIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_694bfd5f667440acbeac992b88ea8fbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befafuni/kindergarten_writing_worksheets_sight_words.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_b1ca454f79104ec8b2ec328d92c6b809.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wegugus/apj_abdul_kalam_books_online_reading_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209addcd-def2-4f8a-bc89-b136939217c7/55973146701.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 5208 bytes
SHA-256: 5e8533d76ae5fadd50d26e2074df13bed8df50e99cb545557257d96aa2ee03e8
font_01_sfnt_off00011d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1D 11864 bytes
SHA-256: 801b0dace155b7f68c87b822b33b895d0586348e0fceaf0664a2c294d07c05fd

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