Malicious PDF — malware analysis report

Static analysis result for SHA-256 4594caae12e69e08…

MALICIOUS

PDF

81.2 KB Created: 2021-09-18 18:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cd60af27ab1fc40354aaae07b5cc3545 SHA-1: c94716385a3d80d8181d5d3cb26e845c40f0f2fc SHA-256: 4594caae12e69e080ef4b802fef322f95c73998f7700b4b20bdc8ceaa6c28205
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress instances or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=pantham+telugu+full+movie+download+hd+mp4 PDF link annotation
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a8cc1120c---60535633505.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/3866a2c1d9a47614954c375e97f79e06/mujiwomi.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/36699708831.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/vimenotevidopav.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/1065501675.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/dirumomerorosovopatadupe.pdfIn PDF document text
    • http://sungder.com/upload/35477892904.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/99546756563.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/pegilamaxoveralesat.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/50592187893.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/77638728122.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/80903874792.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/naguxemeluwamuwi.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/74058143821.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/rixodaleladojawupod.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109021151533144.pdfIn PDF document text
    • http://erex.hu/upload/file/jofanewovawov.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/ralapokimudibipezejaba.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109160118024660.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/45805455698.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ec4f1ba76fe5a206da65d75f7ab2c1d0/rizakusobuluvaju.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/63329372807.pdfIn PDF document text
    • http://packamate.com/userfiles/nejipusokajusiro.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/nfm2os0sn39dtnd6l9s47c6jgn/2515892057.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/dikinusukedaxenuzaxe.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_off0000d90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 17156 bytes
SHA-256: 446a845bbd9293ed64accf7dfafe904f1000594fa321374d3e98c7500a231fe1
font_01_sfnt_off00010595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAC 11008 bytes
SHA-256: 031172870cd85a76312b9d9c7e6ba9cce384c07f7a7218fff8252ecfbf5d8d44