Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c2d2219120d894…

MALICIOUS

PDF

78.9 KB Created: 2021-03-10 17:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a17a47214689acee66f3ab5e578d747e SHA-1: 895e510cbb5f24a0356c4e8e99639e184b39da95 SHA-256: f7c2d2219120d894725eb7c7f5e1b2014ee0fdaf2dba5c7caa7ed00880b68ad3
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to phishing sites. The primary URL identified, 'https://pelibifir.ru/strik?utm_term=where+is+the+battery+for+a+2013+dodge+avenger', suggests a potential lure related to vehicle information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pelibifir.ru/strik?utm_term=where+is+the+battery+for+a+2013+dodge+avenger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422377/normal_6022bc7356a80.pdfIn PDF document text
    • https://fanesorugetefex.weebly.com/uploads/1/3/1/3/131383934/pabojivafo-murajabavodise-tixopixozawola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fe7ce13d9373.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/4199865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5fe57d25e365e.pdfIn PDF document text
    • https://lunogowome.weebly.com/uploads/1/3/4/8/134859941/riloxumusobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_60418cd52313a.pdfIn PDF document text
    • https://gotakepe.weebly.com/uploads/1/3/4/7/134763382/givuzojak.pdfIn PDF document text
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/5090294.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_0e13f6e1f0d3404f93dd5008afeb2b0c.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_ec69332194bd445fbd3c49ef351bf0de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/poe_abyssal_chamber_guide.pdfIn PDF document text
    • https://c9ecad83-e70d-4e71-84d8-0086c45344aa.filesusr.com/ugd/01a317_3ea0ce547162400c8846044fe73c995d.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_ad8d6e4e063c40f3ad32cb99c585b971.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/graphing_and_interpreting_data_worksheet_biology.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_3b0fd0aa8d6c4a76ae63c3b6b3b6ffd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/agatha_christie_biography_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/91816309937.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/graphic_novel_ielts_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/blues_jazz_piano.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_ff97d0131a9b418d8f719e2d76962a2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisiku/new_hollywood_movies_2018_free_mp4.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_2a65e1e4b8854269b8170418d81b89b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/employee_luncheon_invitation_template.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_00335e40a48640e5bd480e991e1610e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/50598237229.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_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 5944 bytes
SHA-256: eb35c8c1208980364fd5f1b54d68a45818023b354415586fa9b18721c47fae7e
font_01_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 10692 bytes
SHA-256: 4b90ae52a275a894e3ee33c285a5e98a7d0c55775e65a327f24b9de7c26c1829

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