Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1afe69a8247345f…

MALICIOUS

PDF

77.7 KB Created: 2021-09-06 12:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 272f073f9811b775a6dce6603f915946 SHA-1: 310b52e3692216f30383ff4f39d00e81c6284902 SHA-256: d1afe69a8247345f6e2419f77d251a927e1033460f060e9dcadce46f028dda1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=great+songwriting+techniques+jack+perricone+pdf PDF link annotation
    • http://5percent-design-action.com/upload/users/files/senugonuduxumixanakur.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/mujomil.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/belef.pdfIn PDF document text
    • http://axwelindia.com/uploads/xobusiker.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/ganob.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/8ienb00fa57348rc5avi3kuvj9/61021023276.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/kevupetup.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/d0187ad4d2cb25d2a0bbeeface473b76/98600687401.pdfIn PDF document text
    • http://0930actress.com/files/files/42409160408.pdfIn PDF document text
    • https://masukpt1.com/contents/files/98412369459.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/jifenudidomagutajiba.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/20606149266.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/acbc12c8e6629ba7c89c9b405f8aecc5/dozufiwawiz.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/zinurotememexagaf.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/xeban.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094de41a5459---foxusefoj.pdfIn PDF document text
    • http://1careglobal.com/upload/files/domufu.pdfIn PDF document text
    • https://ubranni.com/uploader/files/2282540188.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/resegenepituworufutugabuf.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/nezopaporokabikaz.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609478f303f2c---xogebizapofixikopu.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/61680337531.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/mubupinomixoso.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d15d82ddc---32022809314.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_off0000c9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DE 17192 bytes
SHA-256: 8afac1409f39bc4a8d404d995b2b5bc9f6558e9d92a7bf2f52e0924e0dc33a80
font_01_sfnt_off0000f620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 11448 bytes
SHA-256: 0e7e30e57eb06754c10f2ce0a9893f2111f9437286867fcce267d54f966db9ff