Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dad6b0a2a281ad…

MALICIOUS

PDF

86.2 KB Created: 2021-09-13 23:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a8e1bc1cd548d7b59d50ea19a7d65fd5 SHA-1: 35587bdf2d63aa9d85559951fe7e23dee0756330 SHA-256: 22dad6b0a2a281ad6a9f54d81ee05a001dff11ce16d719179be1556cf0d8393b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to domains associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://synerhu.ru/uplcv?utm_term=apowermirror+in+pc PDF link annotation
    • http://isvpro.com/custom/files/77232194997.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/zenopatuzukawedelorobuxuz.pdfIn PDF document text
    • http://grotech.in/userfiles/file/88199543214.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/23422287492.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/65601619545.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/xojivajujefodoxawu.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/fetofebedor.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/sexoxabovukuderam.pdfIn PDF document text
    • http://www.pvvc.cz/files/39205203320.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/10963740654.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/dutijaginurepabom.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/dekatanazaso.pdfIn PDF document text
    • http://elpijisystem.com/file/78421008257.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/gikovetizez.pdfIn PDF document text
    • http://candientuvibra.com/images/file/suxararijuzebunufibapibi.pdfIn PDF document text
    • http://abnicum.ru/files/file/zarogiju.pdfIn PDF document text
    • https://33mobility.net/uploads/files/87144614781.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/fomova.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/52269052149.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/11491626880.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/4117520032.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/9747026299.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/36875732381.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/lupanijinisurubowipo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 17704 bytes
SHA-256: ebd126dce4454182a581339b60d800f81ed3aab4eb9ef72f31338207e5178495
font_02_sfnt_off00013545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13545 10128 bytes
SHA-256: e25244fb904b9ca8f09ce913c3e067bbf9c4061801c4f1d22f6a0fe0b0f1d681

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