Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c30483717fcd8e…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 04:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b8bb78c502de9cd9376e17eb7248263b SHA-1: a5af0693c9d8a1d5e6d656533936ce2a7bd034a9 SHA-256: 47c30483717fcd8eb7632812ced1df151a1790df7b14326073061fcf5588fc51
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are structured to appear as file downloads. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using many distinct hosts with minimal links, suggesting a coordinated effort to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://ketchas.ru/uplcv?utm_term=blink+minecraft+hack PDF link annotation
    • http://bkmarine.net/ckfinder/userfiles/files/1631432850.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202108311704271762.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210903235029_jo2rnx.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/pinegijuvarovopu.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/66176809447.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/penewap.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/24328468675.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/donenuko.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/lifemozafod.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/fafugisunavigogawenivomog.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/ravulusulowi.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109022056251143.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/13781353747.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/puxukepizabewapejax.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/22111895055.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/wijozibekijuronotet.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/88668595353.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/85808430041.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/11577472301.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/fugepenevezevifuwovef.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9a6de41a11059132a0f943805f5aa873/sinizijulo.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/98739886094.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_off0000d91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91B 10456 bytes
SHA-256: 45b4b023ba2165c516385f7b7534a3e67e796a479f49d3d4f66c7d8624be53de
font_01_sfnt_off0000f098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 18384 bytes
SHA-256: d8994d2693d4751328c3b174beb889b612b91c02dd39e34f7af48a63faf958ff

Open this report in the interactive analyzer, or submit your own file for analysis.