Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d212ea706f2eb0…

MALICIOUS

PDF

73.6 KB Created: 2021-09-03 02:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dde5e2e8f8801987fcfbef60e814589a SHA-1: e88a06abf9a00353f9320d6378e0688f40a40da3 SHA-256: 95d212ea706f2eb046fa3e6cf9df84f3239cb398d9e3c5c350bd28c6c4856667
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=jahangirnagar+university+campus+map+pdf PDF link annotation
    • http://market-oborudovanie.ru/upload/file/5283815995.pdfIn PDF document text
    • http://melabo.com/upload/files/jasozixajuvovuliwiwexen.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/wazodatulodavupevigumag.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/eh5ev9hru8a0a3jqu8f04glnej/9239901481.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/33587820742.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/14973943869.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cf3d0f415---vemofuxokubexoso.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/6988810012.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/dixilixoz.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210826_3975377A6A84FAA4.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085edc7e624b---bawomixiforurize.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/97402382474.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/iaotfkd5l442i9npkhc2cbn5j3/1556069938.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///92021741549.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/tejepogonod.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210510031636036.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/pewegadakudafotubaz.pdfIn PDF document text
    • http://axwelindia.com/uploads/47140058478.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/gf6fejir6nmfj5qknruu15l55f/36955151242.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/b523fd3c68d304c4fc35217d9e2d49c5/89666759555.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/rojakod.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///79952187980.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/76812495484.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/zijijifutowexujemunebez.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3da2e5663---sesoxipufevopav.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_off0000bc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC80 11172 bytes
SHA-256: 128602fc8ba4fb3c6f5ba60c581cae0644e242ea515086b5c2b31527a47176b2
font_01_sfnt_off0000d64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 16548 bytes
SHA-256: 0744ba6a2dc767d7e4d5ed223fbbf8fb6ef9235f80248d7b663c4249219370dc