Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30f1c7db6d4e3a2…

MALICIOUS

PDF

98.1 KB Created: 2021-08-12 06:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7f5d0e2ce0c9b95e46ebbf6beb00a1bb SHA-1: bf26b2e3e27e4e6f3283b1837c27efeb1813fd93 SHA-256: d30f1c7db6d4e3a2bdf639dbc89764e6e77fb3fe54b572dd050f77c348b35b30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating an attempt to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://irlanc.ru/uplcv?utm_term=what+are+the+12+meridians+of+the+body PDF link annotation
    • http://buergerforum-tirol.at/file/tazepamupejisavulozamifir.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/82546334503.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/0gtlq09dlsf0l7usgerb0hulhs/36029254758.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160983f7570e06---guxonimuru.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/86904690713.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/bfc8fd46aee540f659b6ab57f69d4b1c/18810083985.pdfIn PDF document text
    • http://fabtur.ru/upload/files/96731567867.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/xesewilekuxowixono.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/mblq8dcsdr9q3v2l4ccpf01et7/87677114785.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/45295ac2e54abde1e9aefb0edd1f3e57/68696045287.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ae9586b19c68779ed247390bc9cb80bf/zepatunilalowoxipudu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c92a72508e14d36348c9353139be1db/xevimofawox.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/82288323273.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f151ef11c---98417234726.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c390c626d---mogemobejodarutefinot.pdfIn PDF document text
    • http://fkhd.cz/data/img/vipes.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/8aafd3e4b1d4eba7af458414dc4c8ce2/86250208519.pdfIn PDF document text
    • http://3q1p.com/upload/file/210719221707641251h3xehsxhsib3.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/397a0486b91e314e9e794b55aca9013e/4569364219.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/vuratimezuxe.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-07-24/images/files/bekufukalomagurugobuzij.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/98413198467.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/jinuwosegajijil.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6cde631ba61177018817cfb21fc05f37/kamadorafusizetemizimev.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23bfca9f93---judepomevemiwina.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8bbeb99be---93466785538.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_off00011c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001348b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348B 10992 bytes
SHA-256: ec4ec25e12e234c788fe0c3f9e9fdb302c67480a326488048586745f98fe034d
font_02_sfnt_off00014e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E0C 16664 bytes
SHA-256: 48936b882a5a9262ac635e227a27fe7c8616aa1581e27673df3c67eff053f542

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