Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b07fb6984eff6f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-21 21:35:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b47bd847629ac3fc6b1922af997ea505 SHA-1: f8d7350d07cdc1642cd4cf6e14f84b4bb1656eac SHA-256: c7b07fb6984eff6ff63a4004cec3c89961df9dd9609a079608a0624c95a15683
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one prominent URL pointing to 'botokaw.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=breakup+diary+shayari PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379500/normal_6054e6129bead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_6054aad5c57fe.pdfIn PDF document text
    • http://getallcreditscores.info/20070133880mtrcu.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/31504159874.pdfIn PDF document text
    • http://lnstagramsecurity.net/is_there_going_to_be_a_warrior_cat_movie4h911.pdfIn PDF document text
    • http://koxudizujan.mywebcommunity.org/fukobinad.pdfIn PDF document text
    • http://xviiivbgz.com/how_to_add_business_categories_in_quicken7it7n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fe10a4e4d314.pdfIn PDF document text
    • http://geosen.net/57997095164pq7k0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_94aa188c832b474185abda949ba0ccec.pdf?index=trueIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/kindle_lending_library_uk_how_to_return_a_book.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_d2f562666fff430bb361931e59da0b9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/somewhere_over_the_rainbow_chords_capo.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/assault_android_cactus_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/influenza_treatment_guidelines_us.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/equipment_preventive_maintenance_procedure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/266868714.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/38275029544.pdfIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_3964a40abb114532bc36fb57d8850c5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/twitter_app_for_blackberry_10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA54 5232 bytes
SHA-256: 28b2a6a8251de5237aaaab5481bc17121a8aca02022df99b045d2ba4d2656d1e
font_01_sfnt_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 9868 bytes
SHA-256: 705da5e2d6fe06858f5116216fd79b849b26c0fe213f2842bb1562225fd5251e
font_02_sfnt_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 9348 bytes
SHA-256: 5000413406a53926845d31371dab9d64559c665c30fbfabd34812ba219f776e6

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