Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba8f324e8db0684…

MALICIOUS

PDF

77.9 KB Created: 2021-09-15 21:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 488848126682ec67cb088c3ffccc537f SHA-1: d6a8d8c7769caf3816dc70d4b1bcae8cce0796ff SHA-256: 8ba8f324e8db0684ef9b3a9f919900ee4111bc2bd81b1f78907830ba6b1516e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute phishing content or malware. The presence of these links indicates an attempt to direct users to external malicious resources.

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://inwebjor.ru/uplcv?utm_term=world+of+tanks+blitz+generator+unlimited+gold+credits PDF link annotation
    • https://tagoproperties.com/ckfinder/userfiles/files/segijibikelakale.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/sekopisafikizej.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/senoxi.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161401768cc7b5---rabarifuwejofagivinu.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/ragaxefelativosawigow.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/91618512902.pdfIn PDF document text
    • https://loyd.rs/images/file/kazutonuxaluvinefibejot.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/neworafuwutedomoni.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161304b8ed46e5---lejelowixililojagur.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/fajilerovewofaditebu.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/sever.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/kuvifapidalagisuxiwus.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f52420ac4b---xusalugakuwewubarikuxifux.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/54351213208.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/10/64880485557.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/74888648094.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/nuruzevozufemulufowuxuto.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/67376088542.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/dofewoge.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/47499779224.pdfIn PDF document text
    • http://tonghuichem.com/upload/files/81605918225.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/31632992812.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4f668fff0---gedadelulawagomumuparaku.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/33699255123.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_off0000caf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF3 11204 bytes
SHA-256: afcc6659281786469be76afac1201e2a7882604bfa48a98f991bf274de2d8d27
font_01_sfnt_off0000e502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE502 17112 bytes
SHA-256: ace6c48b273fa7d19d3de449188d3bcbe4d51aa85d783bb323359a1a0633a1cd
font_02_sfnt_off00011167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11167 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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