Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f86671e4b7b0da…

MALICIOUS

PDF

74.9 KB Created: 2021-09-19 04:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 75b98083ecde41a5269ad1896c9c07c8 SHA-1: dca23a3b272f9ee0606419b449922e93b828d3bf SHA-256: 25f86671e4b7b0da9d521285793bc3f05477bab94fb888c6d14e1b5f2a11d176
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these external sites.

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 http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142cbfdc923a---xejodijizis.pdf In PDF document text
    • http://mazraeir.com/images/upload/files/43689381570.pdfIn PDF document text
    • https://12shio2.com/contents/files/serujefu.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/75323910847.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/a149473686c377c0ecd24e28b62b8b4f/24056965466.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161449730a91e6---bekafarevutesizikup.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/12548785040.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/66976260762.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/7a29429168368c2690d3877035252984/34397765801.pdfIn PDF document text
    • http://www.polni.si/Images/files/29680495014.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/lojirepopusenakuk.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/71910901295.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364c5aa1e79---xopofekimege.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/77136901902.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/dorisonajejekaguwedonineb.pdfIn PDF document text
    • http://arsvet.ru/img/upload/walatatusuwoxapuwi.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/japutebugowifo.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/99893101692.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/jenowavimem.pdfIn PDF document text
    • http://melvin.cz/data/sewidenuk.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/nijelekojasujidigekawiw.pdfIn PDF document text
    • http://www.terresdescaraibes.fr/file/jolilidewanibu.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1631853846.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/0a0a6ddec11d5d33c36ce414713ac707/lovixebiwaset.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=mortal+kombat+the+movie+release+datePDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/dewesamusilebirutexuluk.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_off0000c024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC024 17336 bytes
SHA-256: 2c8fde40f16805d0ebf000ee96c6e5f70338b394d29a161af4e4d166b245431b
font_01_sfnt_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 10700 bytes
SHA-256: 63a16f11d1f193c53bc86b6cf90b6119cd7646e1e4c0705fda3bde75de0ee065
font_02_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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