Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8b5bb3c1e039a3…

MALICIOUS

PDF

86.0 KB Created: 2021-09-04 21:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: e7641bcdc115adf0c825e7ed01fd85e6 SHA-1: 7fdf76b59c51a1b5ed219c18aba6c232293b7a21 SHA-256: 5d8b5bb3c1e039a331f9b3943449a86ad0cd10253449eee05ac8ef0781b537ed
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc604f94a2c---53732004208.pdf In PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caecf368d2b---bidejuk.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/lapikipixufizevod.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/89609331995.pdfIn PDF document text
    • https://vayoto.vn/userfiles/file/15052738354.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a075234e99c---wudaluwurukifirebonojog.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/1ae483c84202fe76c404bbcf24bf57f5/zejuvumek.pdfIn PDF document text
    • https://elektrona.cz/files/file/47654404357.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/95408567363.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16112249c98db7---zagakuvokilub.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf870a160---86594564610.pdfIn PDF document text
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/45363042477.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fb3d3467e2d269a4c2d733727af066ef/javuzogidebitutos.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/butefolorop.pdfIn PDF document text
    • https://carlojans.com/cms/file/84368433297.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160731486bd820---fejot.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/bilawininusonijudozinagow.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/bosewokowamavakaki.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/48592061dc62afa26d776a315ff4047d/nuvujuje.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/4511094009.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f5553c3b9---girive.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c502f552---27567005336.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/59542105851.pdfIn PDF document text
    • https://kopari.hu/files/file/bifejupabemomobefudobuz.pdfIn PDF document text
    • https://lamthong-marchph.com/piceditor/file/pugazurodaloxipelajize.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/fbb29877f12e6b963bc3032d3037e6f4/93991875130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pediatric+nursing+book+pdf+free+downloadPDF 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_off0000e3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F5 19672 bytes
SHA-256: 5f77f20237e4c0f4d4632c197e154bdbcf29e518734f0a7898b6585d4f399393
font_01_sfnt_off0001179d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB4 11212 bytes
SHA-256: 829ebc58945f26a176c3235caf1b3adbcecae7055e13d5ab2be235d4deacdd8c