Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd362d4953331a0b…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 12:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0e3901923f8494a431853ab46627960d SHA-1: de8a8334b338614f0fbb5302fc168b2a07205804 SHA-256: dd362d4953331a0bea3b23ace3ada08829325c3edb7be3c0640c789113bae422
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, likely to lure users into downloading further malicious content or visiting phishing sites. The presence of multiple links on compromised CMS uploads suggests an attempt to obscure the true origin and purpose of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://citysoupsbellevue.com/uploads/files/rogebagulawunugiri.pdf In PDF document text
    • http://shukokai-voves.fr/userfiles/file/nurudeja.pdfIn PDF document text
    • http://elskenecologie.nl/files/9931460430.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/labolomurefikolugeze.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613f286491766---dupivuvevejiwevadevetoni.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161393c6b9a6c5---46622003150.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/xuresikapajorulorituvuk.pdfIn PDF document text
    • http://www.moyekolodin.com/files/95723895373.pdfIn PDF document text
    • http://sbairs.com/datas/files/rojelibusaxajugadewisetog.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c5a0c9dbb9ffd1a69e940c827951b7aa/kemaver.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/poromog.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/boxonepu.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/79952899162.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/u37sk18ltb7qpqued6m7kcpp97/20486549752.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///64665265068.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/gaboludareb.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/fedalogonatibavumab.pdfIn PDF document text
    • http://kdekdyjak.cz/data/tilejivix.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/nitekumamimana.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb96d28858---6915846327.pdfIn PDF document text
    • https://kiptep.ru/file/30642835558.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16140af0b5955d---nikasiwilolixamopogevep.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/nelixoxiwivosupi.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109151716152618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=elements+of+the+nature+and+properties+of+soils+pdfPDF 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_off0000e1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 17720 bytes
SHA-256: 331af8f13aed2a4a6a5751f3085173482f375b0ed6886932ca08525d0a2b5c9d
font_02_sfnt_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 10848 bytes
SHA-256: 1b274a21e90b8aa5fb2b94172ca81622a984a364b7dd23d57662ab47c32ddf57

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