Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc294c6ecb6628f6…

MALICIOUS

PDF

82.2 KB Created: 2021-08-31 04:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ded4e7b7569630d5dd96fae698e3c2a7 SHA-1: ea529d524303451eddf67e2c438d96d2c0d90ec0 SHA-256: bc294c6ecb6628f6b6bc954fa0624a7029b698487f4101f80958545fd2c6cf01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://cructi.ru/uplcv?utm_term=difference+between+mountain+and+eastern+time+zones PDF link annotation
    • http://www.extramas.com/userfiles/files/rosuxobixomo.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/gabosuxigudosuxaxim.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/57879245724.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/685aa75fed475fd31339e4e428116d8e/35252640117.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/e2f1072c506ff44f723e921019850f66/34533758064.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/91086286630.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c789594d38f---83382082754.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/sijafowigopo.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/8q0arpi3eugl9neaehhqk8glq9/vafapelam.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c501863d91d---topex.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/sewamadedomanipef.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/xubisofalefapedurevet.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/17u9auud2nug9t1b4c7ime96f3/muxotafuxosizibasolezesom.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/8316986804.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/13450062157.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076acbf9d1e4---29953880565.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/9v8s7rgf4ofap3890gqfjcmmtu/ranezom.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6o2o4gfvskd7edfgbkkviic655/1473198872.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/19276236530.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/ca61104d1dc4c7e8ee643772b50e0bb2/jitejudinuvisa.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/xomididarasolufadabor.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/67569453024.pdfIn PDF document text
    • http://gibisch.org/files/files/23564675289.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/zugatugakaw.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_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 18460 bytes
SHA-256: 44e3f704f8ce8be0c9537641893f5fccdb21384c4fbf75fb2a53cfd274af1595
font_02_sfnt_off000120ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CE 10976 bytes
SHA-256: 43875997616333609735b3d2665fe9efb12d54300a3ff77c23bf993c5e14e2a0

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