Malicious PDF — malware analysis report

Static analysis result for SHA-256 1943c8aaba503783…

MALICIOUS

PDF

81.4 KB Created: 2021-09-21 23:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1ac3993b22a8edb9320778894fc8f648 SHA-1: 46a053706f04cb4e24cd34c761609447bcf123ea SHA-256: 1943c8aaba503783b5beccd6d8fb804c007c3b7e5ab83553c096a564b018da7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://arcadia-fitness.es/userfiles/file/tukusiwetofose.pdf In PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/be72558be5bb0cdb65f2a63f31d89b77/zojure.pdfIn PDF document text
    • http://brushes.tfe-design.dk/userfiles/file/bapijetum.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210911084637.pdfIn PDF document text
    • https://kuepancong.com/contents/files/83976186742.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/jupigolisolugomamapamumo.pdfIn PDF document text
    • http://www.polni.si/Images/files/jalijakapekodivodalajiwaf.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f09b893588---xilab.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/93727984713.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143c348ebd73---59694170394.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/cdck851bvpvrrsod82g5anrvkp/24650005391.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/widegafuxas.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/bavogezebuduweketesaxodi.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/oad1f0t4r685gk35f2rlpva8ua/59595473394.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/wamimetuwipu.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/dowetodirepomezezituniwi.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/japobaxaj.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/dezufewigev.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/74726182748.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/sinuvizevotaj.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/kavitazetazixoxufezofa.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/26703244420.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/36618707095.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec685d1143---37126609016.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/vumetufiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ios+apk+download+gamesPDF link annotation
    • 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_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 17212 bytes
SHA-256: 33f020fb20cd8b1a0d8fed10c283db28f948124366cd0f1a47fdda450eab7298
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 10572 bytes
SHA-256: 39d75b2175d4d9089a03e5a6ec543d8db1fa0b924647a682112d0c8f88907b06
font_02_sfnt_off00012045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12045 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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