Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa41b65e7e8cb95…

MALICIOUS

PDF

106.0 KB Created: 2021-03-19 22:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0c84bed222fbe2470025be644678f5f9 SHA-1: 7b8be662389d7aed2d24bbd8f99a38a45295250b SHA-256: 0aa41b65e7e8cb955aebf95f08dc414bd648e1fddd6764d721022e037fb9a930
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming operation. The primary URL, https://maypoin.ru/strik, is likely a malicious redirector. ClamAV detection and ML classification strongly indicate malicious intent, specifically a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=el+dador+de+la+vida+biblia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380083/normal_604af845e6c3a.pdfIn PDF document text
    • http://milanbeachs.space/wamupovugales0ism.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5fcbc756708b0.pdfIn PDF document text
    • http://myyshooop224.site/sengoku_basara_2_ppsspp2442o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5ff755c6443b1.pdfIn PDF document text
    • http://streamsweets.com/ps4_controller_on_ps3_not_working_in_gameoalpz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_600066f7d5421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374700/normal_5ff719bfb7a02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_6006be11cdb06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486521/normal_5ff69dd3693f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453719/normal_5ffe56a1c31bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408485/normal_6043591977917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_60490c1905580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475208/normal_60306aa1607b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5fddf623dbbc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mivogunav.rf.gd/lozokezajogujox.pdfIn PDF document text
    • http://xuwuxubemepimox.rf.gd/illustrator_portfolio_templates.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/call_of_duty_ghosts_gameplay_pc.pdfIn PDF document text
    • http://vipukexevuwe.epizy.com/nizolazos.pdfIn PDF document text
    • http://zarevamemamafo.rf.gd/free_romance_books_online.pdfIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_34d5dcac0a3b47fc99eb27953ca95b92.pdf?index=trueIn PDF document text
    • https://abe99a74-823b-4c5d-85d6-f8d8de52422f.filesusr.com/ugd/73cc63_14babe3f12964673b3a055f387bc7c19.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151AA 4400 bytes
SHA-256: 6e35d4338aa929463c0fe9488e4dac3870c09bd9808761ba0f2d3c4faffc6c5a
font_01_sfnt_off000160a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A8 13160 bytes
SHA-256: d328f2fa8d507be37d37c28ecf42afc2c3d387a487344f46c5f2981ffbe3693a
font_02_sfnt_off00018abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ABC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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