Malicious PDF — malware analysis report

Static analysis result for SHA-256 8095bfc7a77e9e7f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-09 23:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 96a957bace0a74231bb4b596bee87e17 SHA-1: bda743b79fe8cae5fdf34ca37fbb5048e402cbf2 SHA-256: 8095bfc7a77e9e7f0d225ccabb8ef17d8ed4c03b248a7a29760a6deeabce958a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for 'how much does mcdonald's pay its employees'. This is a common social engineering tactic to trick users into clicking the link, which leads to the domain 'resalured.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+much+does+mcdonald%2527s+pay+its+employees PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503279/normal_601e985f2da40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445881/normal_5fc73bab46917.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/56985939646.pdfIn PDF document text
    • http://therarbooks.com/34638812278xdigs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_603162bf06d5f.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/61330693420.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/social_impact_assessment_process7fjok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426944/normal_5ff5e025d7e23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420014/normal_60048073256f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_600cbe0c0d65f.pdfIn PDF document text
    • http://how2clever.com/683796285797e78v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5ff26c61c9d1a.pdfIn PDF document text
    • http://ebay-coupon.ru/la_noire_ps4_game_guidexpuj4.pdfIn PDF document text
    • http://nakanilo.club/91967848187p9wqz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465151/normal_5ff04af3987e7.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/act_cabs_book_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487192/normal_5fe4d24bb92c7.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/5863628c-d774-4e6a-af38-fe7bbcb5eb56/barobunataviluxetosowawa.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/fojekimopageluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7047264-8008-40be-80f4-8b9f30dad5ac/how_to_write_a_fantasy_novel_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c968ac3-3df3-4640-8db6-14fc9a1229d9/how_to_think_critical_thinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f72378-4be2-43ef-a067-d2b349fcbde1/teduzavefa.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/what_is_constant_heartburn_a_symptom_of.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_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 5404 bytes
SHA-256: f1c9e87c1d2bc9e9e548a5a9ff80ba5461289f3ea16bdb7ce75cfea040b9d76c
font_01_sfnt_off00010f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3E 10956 bytes
SHA-256: f01c0e554719859cfd2118ec57472af2631f2371126dee46b9c6c4d78468ce63

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