Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8267ec7452ad32…

MALICIOUS

PDF

82.2 KB Created: 2021-04-25 10:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f50ff569e7179eb11a1dc57935bb12bd SHA-1: aa59201b5fc8877071c2240c8da575344b991336 SHA-256: 8c8267ec7452ad32e3aeb40d96947fdaef76af2845fd90f12bd61f63d134002d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. ClamAV detection and ML classification further confirm the malicious nature of the file, likely serving as a lure to phishing or malware download sites.

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 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://golowaki.ru/strik?utm_term=what+types+of+figurative+language+and+imagery+are+used+in+the+poem PDF link annotation
    • http://lenugaguv.medianewsonline.com/criminal_lawyer_salary_uk_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420917/normal_6061a13623130.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/a_knight_s_tale_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490264/normal_603587655e4dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500877/normal_5ff1bb1969255.pdfIn PDF document text
    • https://pigikitukapu.weebly.com/uploads/1/3/4/6/134693564/wawezen_farabawebuz_bezule.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/air_force_y_group_model_paper_download.pdfIn PDF document text
    • http://gozipoxeget.iblogger.org/bomberman_land_pc_game.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/7777728.pdfIn PDF document text
    • http://milafikolume.iblogger.org/surface_anatomy_of_heart.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/821451.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/zelosuboketusiledem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_603e6df673a6a.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/faputet.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/dadokexefutex.pdfIn PDF document text
    • http://tigukifi.getenjoyment.net/advertisement_writing_examples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japinoxizidunub.myartsonline.com/35685250300.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/bogilaweloxude.pdfIn PDF document text
    • http://bitines.myartsonline.com/74661522995.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/61592158699.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/guzoxodonusi.pdfIn PDF document text
    • http://febufufun.rf.gd/is_the_esv_study_bible_calvinist.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/redekajesujufimupilesem.pdfIn PDF document text
    • http://puravusixatix.epizy.com/25072454537.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/job_interview_questions_and_answers_download.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_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 5632 bytes
SHA-256: 251826341a4d0b66a902f25a49fa157891289adc28458c045c66eb1a012293a3
font_01_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 10764 bytes
SHA-256: 90edae12e8b480ce4875977495d2a890b65085850c6ef5caf7cc4653f71f35eb

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