Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ee14b5b5003bd4…

MALICIOUS

PDF

85.2 KB Created: 2021-04-28 07:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6fa82e05c675996fd53057a9ba344e61 SHA-1: 21066ccb0c37ba09d1453015c7c3ff8f61f84454 SHA-256: 37ee14b5b5003bd443ef38956a3227c0589458f82c02b77469e16137a188b57e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/strik?utm_term=cirque+du+freak+movie+rating PDF link annotation
    • http://mattelipsticks.site/suzegegomidfpj7c.pdfIn PDF document text
    • https://cdn.sqhk.co/pubusudes/jhaZidQ/92762287907.pdfIn PDF document text
    • http://cashtanks.fun/6342345735w0q7v.pdfIn PDF document text
    • http://milanbeachs.space/love_languages_worksheetfy16g.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/foggWgi/74419554487.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dm5439a/smash_ball_game_pill.pdfIn PDF document text
    • http://jumpfs.space/zaferolinatiwajaggdvd.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/m0jjaY6/jobomepij.pdfIn PDF document text
    • http://govnosiakxws.online/83637874700tzoux.pdfIn PDF document text
    • http://kindraretterath.com/rapobipafumamowigofotuj95sx9.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/QgghEic/lead_teacher_interview_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_0e769113e05040d8b8e89a9b51be39e7.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_5ed7d72cdc7e4730973a6aaa692ecc7c.pdf?index=trueIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_31b6f9d37ebf4acea05731d89e0b1251.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a65ef05-5f8b-4fd0-8d23-c99deee9d3b4/sidemen_book_sales.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/kuwumaxuxewadesuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a055fd98-1b2f-49e7-b9d7-05d797c3d282/81600594062.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_8ecb6d4d2103474eb6cfe2008393c03c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81615812-84ff-4987-99e3-7b1cc84d03c1/steel_structures_design_and_behavior_5th_edition_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/hierarchicaldatatemplate_wpf_expander.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_off00010eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEF 5172 bytes
SHA-256: 1e913dd52d6303a60469901669d464598ffcf1f7319080c823f33ba369c8744d
font_01_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 11548 bytes
SHA-256: 9659aff1b281042fdc29de3f6dd687d9fef1ffd1f8ba0b7e4216f383069e6e88