Malicious PDF — malware analysis report

Static analysis result for SHA-256 396caf6523b1112b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-19 17:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 35a9b6ceb2727bc8cbeebbf861969372 SHA-1: 539daeddaec8fe4dd6a46ca806969f32ccd27588 SHA-256: 396caf6523b1112b905464b97eab924b5a0140f3ed03aed088416e231af5c70d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://pelibifir.ru/strik?utm_term=bhagavad+gita+translation+in+kannada', is likely used to redirect users to a malicious site. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan payload.

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 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=bhagavad+gita+translation+in+kannada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458407/normal_6017f82c0f314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_600468c0b25cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_60282a503f483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/mattress_sheets_walmart.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_2db874c03896447d8d3d34f2a8d72aeb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/diagnostico_organizacional_definicion.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_a0c6cc506d9b4190a02a11e18a94d61d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/osteoporosis_tratamiento_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/50585828467.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/best_free_guided_meditation_podcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9443437d-9a76-404e-8a5e-162706193bd5/rent_history_report_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/doribi.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_9af8b39b70d1434c95af8126ef73844c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/injury_reporting_system_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/vavefuzaxefo.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/correcting_wrong_information_credit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f1e7e6-46e7-4df3-934e-6628ca1e4335/rebekilekofev.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/ffxiv_armorer_leveling_guide_50-_60.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_362faa3d6c46474fba6ac23775bc0245.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_ed8f910823aa42ba99f592d831f78256.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomogas/cosatto_supa_stroller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd905062-c697-44cd-9d1c-c1fd05c282cd/counting_by_7s_book_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17ca520-c859-4280-80dc-80ecf65e5991/38853491556.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_off0000df84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 5260 bytes
SHA-256: df0494946219d9ba87d14c1af3be7b08d704bb9a9441a9b117ba3718ce0f1c49
font_01_sfnt_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 13112 bytes
SHA-256: bf348bebe19843fef8cad88a1002111d53f36f5cd1c8334c443fd059200128f5

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