Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5862dea30bf0a3…

MALICIOUS

PDF

82.4 KB Created: 2021-09-11 20:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 90653927630547be1b4cc743423bc10e SHA-1: d144284245d643c09f8a70b7d4364de30dd20a24 SHA-256: fa5862dea30bf0a3af479f2e7c345fc06c9c9e92ab751c854ee2c51af7ed4be3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://mvsexpo.ru/admin/ckfinder/userfiles/files/budemuwabe.pdf In PDF document text
    • http://mirrorlink.com/public/files/files/lovizatewijozizoparijipij.pdfIn PDF document text
    • http://ktcz.eu/files/files/xuvepopav.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/64649441007.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/91458632322.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/62190452776.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/a8cda80ad74c54ae13f327f0a0e84c9f/65493258394.pdfIn PDF document text
    • http://cityfate.com/files/files/48380739500.pdfIn PDF document text
    • http://mobiliteit.nu/files/kesenixetutowize.pdfIn PDF document text
    • http://salwex.hu/file/19656342643.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/89547977370.pdfIn PDF document text
    • https://harmony.im/userfiles/file/52395374834.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/49087976064.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/ritogoko.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/bozapuzakagoradafoluf.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/velesupi.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/mazususuku.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/27791177053.pdfIn PDF document text
    • https://penal-garazh.ru/files/27745641535.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a616f387b6---95229524069.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/ponowepuralezeguliri.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/48943485513.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/siwunifakipemusilubivimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=redmi+note+10+pro+manualPDF link annotation
    • 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_off0000d12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12E 21976 bytes
SHA-256: c2d7793548785ec161fd2641d4f8e1a2f8c0da36affc6d2b5cee99a2c19deeab
font_01_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12257 10704 bytes
SHA-256: 842afd1f872774ee15f6ae6f45c80faa5a73e3160e6a0f7bdf11cfc74e08b14b

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