Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a0204b73707ceb…

MALICIOUS

PDF

76.3 KB Created: 2021-03-11 03:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c69916a8309f0b3500b68fcbeb660fd5 SHA-1: bd3e29d6d194b583ab79958d3f338e6a66e6f18c SHA-256: 72a0204b73707ceb18072344deddef799a8ba3f94b5bf1372a3ed34dfdd1c6b7
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 point to SEO-optimized PDF files, indicating a link farm strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://zajinet.ru/wix?keyword=andrew+x+pham+biography', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/wix?keyword=andrew+x+pham+biography PDF link annotation
    • https://cdn.sqhk.co/masamiwe/eiiqXx0/virofisikukirigonapak.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/neduk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_601f847b63d2e.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/jijbQfa/getexawusifokojalebeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_603901059995e.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/gfFgige/bollywood_song_ringtone_download_bestwap.pdfIn PDF document text
    • https://kopepadozuko.weebly.com/uploads/1/3/4/5/134505487/bapokup.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/kirot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389370/normal_6030f8ed2c152.pdfIn PDF document text
    • https://nijelulegokep.weebly.com/uploads/1/3/4/3/134318748/vodugewifitap_worogimaz.pdfIn PDF document text
    • https://zimosamizafokox.weebly.com/uploads/1/3/6/0/136091721/vebivaxovapola.pdfIn PDF document text
    • https://cdn.sqhk.co/mifimafonuku/ie8ggUr/bmx_bike_races_near_me.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/varoximu/agriculture_census_2015-_16_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/vozewozazemima.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/50997619994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e5fceb-b33d-457b-8b7a-1af1f0c27d79/zinizutezezosefiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/40890773254.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/inspirational_quote_template_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/nefonapi.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/kidupefogenikaviwi.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/64388502688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326e34e8-8561-44d2-911d-e89d3fc073d2/keduze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc21a05a-a52a-47f8-b383-57bc42a87dfd/xetijajovujijikovawuj.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_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 5552 bytes
SHA-256: 91f5f960052770e582e224bcd9eabed368d3044659234461c52388efb07502fd
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 10520 bytes
SHA-256: 5f47af9e642d84e35b390b216f6d71bbb73fd2e85777aaed3bb7f97d1876e5c2

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