Malicious PDF — malware analysis report

Static analysis result for SHA-256 597e66d4bf7add8c…

MALICIOUS

PDF

72.8 KB Created: 2021-03-08 23:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: c594eefef84771f0bfbf25f7b4732dc8 SHA-1: 6e50b5b95db74fb7e3837e91c4fedf9549246cda SHA-256: 597e66d4bf7add8c612afdc686d23c702009c6571aefd9c53baffac90e6daab5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the ClamAV detection. The primary malicious URL identified is https://xezojetit.ru/wix?keyword=hibernate+or+migrate+worksheet. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xezojetit.ru/wix?keyword=hibernate+or+migrate+worksheet PDF link annotation
    • https://powonevupurig.weebly.com/uploads/1/3/4/7/134704952/gobep-mopatekogoxeb-reluvodimeno-reripurof.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/jedakepuriw.pdfIn PDF document text
    • https://kuxokovu.weebly.com/uploads/1/3/0/7/130738635/8615584.pdfIn PDF document text
    • https://runonidalebemi.weebly.com/uploads/1/3/2/6/132682230/korodijomusepozekur.pdfIn PDF document text
    • https://mewarikubunaku.weebly.com/uploads/1/3/1/6/131637951/wukugala_nezozudujax.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/25b7f4ae-a55a-4613-ab4f-b4502ccd73ad/hamilton_beach_single-serve_coffee_maker_problems.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_def7579a8e284d5e8eb9f4c7b62bbb17.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_44c4d380929a47efbc325e697d469f92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugafebip/aruba_clearpass_onguard_deployment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/android_box_not_working_on_lg_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/77598782473.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/genesys_security_guide.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_6414d3b816eb426fb858856de86693ea.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_7776c39864eb481eb0e931ee31029cdf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f68f68-4f63-4b4d-bbb6-d977af620e29/51271843472.pdfIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_c0ca1f11e99949a59a2f4f413c30550d.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_2bb1a61ad6db4152a6fec7350696db32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satulibaren/bharatiya_janata_party_registration_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224ac5ad-c215-45de-be94-6f9a051c89ce/28323298070.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_e44d1433928041ea8f997b88d6b86eb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miledu/code._org_course_f_lesson_11_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/manual_aceites_esenciales.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/balls_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/ninam.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/gezevekolafuzagefe.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_e63fe13e520e4a9daa5db55b5a6cc09d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE149 5324 bytes
SHA-256: ecf9928259bad77ea3cbc5a0f9094c61d12538c9605e52d5d02e26ffddc26562
font_01_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 9996 bytes
SHA-256: 0f94717d9b4c8ebdd3c842de9a966ed30990604a93cbe7431f87b04896173476