Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d57d5a13ecf6bc4…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 21:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ac79a5e4bb6c31e3e0c1cb952e999e0c SHA-1: 07865ebf3127e7cdae87dbed286ccb0a47c9dab3 SHA-256: 6d57d5a13ecf6bc43372ec15e3fcfafa3207811a5d83475cf81e0e2845ab8fb9
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it hosts a large number of external links. One of these links, https://soxebez.ru/wix?keyword=types+of+worldviews, is directly embedded and likely serves as the primary lure. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan PDF.

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://soxebez.ru/wix?keyword=types+of+worldviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403274/normal_604fdcd3f0947.pdfIn PDF document text
    • https://danizejoj.weebly.com/uploads/1/3/5/9/135990884/roxidoweresi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453908/normal_60184ec39cbc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_5fe92dbb3121c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486060/normal_5fd2f463ddd18.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/3d9a3d557f4369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5fcae0dd86e7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_6033ed699f791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_601d854692d87.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/8236024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449783/normal_60158f7d588c3.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/kitakilesa/23054478383.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_872cd8e1841b47ec8e875001eb8115cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lawakux/kenmore_elite_smartheat_quiet_pak_9_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/application_to_principal_for_marksheet_correction.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/word_link_level_641_answers.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_c8d41166dee74c478809ee8ed28a453e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kabisebax/vitamin_d3_in_pregnancy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/17326743812.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/86229851153.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/2019_tamil_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/26376443259.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_16e71b8f97b640d995470770c3009978.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_35ded58896764e1488cc9674d01d51b6.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_4c7273dfc7394a729f2756219054be2d.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_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 5028 bytes
SHA-256: 5bec0073ca693703dc8b38130f5ab81e0b51a0e2b53ab9ff13145bd3917a83bf
font_01_sfnt_off00010968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 10452 bytes
SHA-256: 5a987dba342cf2f0555720c7498569621442fb9829e96d377113f14c1ecae059

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