Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad35065816fecafd…

MALICIOUS

PDF

123.5 KB Created: 2021-03-11 19:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 54a266498f9cacff2a2aa19cb78027b3 SHA-1: e24622941a999d22d0bbd841dfbfce549731675f SHA-256: ad35065816fecafd4825ea4bc9881acb9b0a162729ad789a7173462386679b72
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as search results. The primary URL, 'https://xezojetit.ru/award?keyword=economist+intelligence+unit+democracy+index+2020+pdf', suggests a lure related to a specific document. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links.

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://xezojetit.ru/award?keyword=economist+intelligence+unit+democracy+index+2020+pdf PDF link annotation
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/duvolewoxufuf.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/cjamod8/abs_plastic_electronic_project_box.pdfIn PDF document text
    • https://cdn.sqhk.co/duxevowoli/wjg8war/57197186257.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/balifavow-rogosolo-fafelopexemuw-sujufabexixoda.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/ajbjYjb/95307107468.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/GSgfYja/water_glasses_set_of_8.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/5228752.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/ibWfagg/9293120607.pdfIn PDF document text
    • https://palufiboninu.weebly.com/uploads/1/3/6/0/136020493/roseromefovedem-vapiwemamekit.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/f5DIpjg/titan_quest_ragnarok_best_build.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
    • https://s3.amazonaws.com/pusixa/finnish_passport_photo_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/zuxatelekukapenejeduto.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_13a41d6f6f634d1d8f9cec4a6355cb16.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bepukuba/betileragitudelofesudi.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/12688497008.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_b05df65c3a704f6eb4a22b79ba79a564.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lumixi/list_of_all_irregular_nouns.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/repuze.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/lego_architecture_studio_set_21050_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/mini_villagers_and_deforestation_ielts_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/top_10_apps_2018_android.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_off00019277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19277 5756 bytes
SHA-256: d9f96f72a46fd89c617bf31f35fc9f793f6765a00ddf3b0a4601e2541d5e07c5
font_01_sfnt_off0001a5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5FA 13616 bytes
SHA-256: f306576513bfaa53c32b38f66868d52ee4cb67c912722cc8774b4f8a9602a83b
font_02_sfnt_off0001d168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D168 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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