Malicious PDF — malware analysis report

Static analysis result for SHA-256 2679d56a40fbdd96…

MALICIOUS

PDF

99.7 KB Created: 2021-07-13 21:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 63c96508befba8f9fb57f270d5b4cdc7 SHA-1: bfb43f6058c25ae08d9edc2b7fdfa9faa2e66f17 SHA-256: 2679d56a40fbdd960f788379ca5282d49159442601ee34f6fddc136799b4403e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and links to compromised WordPress upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and numerous external links point towards a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://queure.ru/uplcv?utm_term=airwell+rc4+manual PDF link annotation
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ec0dacf8e5c02b35ab433f85a3358e1b/bobirolubo.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/veron.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8cf05b3e14533a6e5415bcdeb006d187/jivuso.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/nenererikivatalaninodanel.pdfIn PDF document text
    • https://banghenails.com/upload/file/ropeponulut.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-13/20210713085924359329.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/4410a84839148e8b22c8f008a47e2217/bigitowasaponofodadirutid.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/1379566066.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/36b2d2e6c90ab9a86ce13ef7adf2a05f/dalawinupevi.pdfIn PDF document text
    • http://gdgom.com/upload/file/2106260501159956733clwl5jar2kk.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711382b64c7---tuzolagiboxifi.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160874aecd5c4e---62810820362.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/tavuzelobujadutebos.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a82147e8680---13454811672.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfa6a1781---zokewidopoxovutatidekim.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9c9612581efe179a64013195f8bbdaa2/sesopexudoviferijisar.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/69210c1b641ccd8687b78235d34c2c14/21848511325.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98f81eb8b3---76839192700.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16076ccb16f23f---dufazekoliwezoxofozot.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/20347349764.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/9754004556093228eef5d2.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/1ef7740824f81229d01d7e20ba365511/sinilozofizavasowibarom.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a8295c93e6baa8258acc1898574f3eb4/salavepima.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_off00011e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3A 21480 bytes
SHA-256: 446d7f35b34c974fc83f3d2a483afa311dcbfeb22184247d2c1b7087274db390
font_01_sfnt_off0001513b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1513B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16952 10252 bytes
SHA-256: 5e1c7688835d549017d541f109b873c3591c74766289b4ea1221d3911cdcb89f

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