Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b9c79b16b45382…

MALICIOUS

PDF

72.3 KB Created: 2021-10-01 21:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: e229151242bc22545e69e6216b11e2e7 SHA-1: 57553da02dd5f620a2403d2343cc4d0ee49ca018 SHA-256: 72b9c79b16b453824c80b856e00cc0beca3f8bde96718c96614fe2dc8c1d7825
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infrive.ru/uplcv?utm_term=carey+organic+chemistry+pdf PDF link annotation
    • http://myjobcareer.net/userfiles/file/2021092419324073499.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/fotowimanilevarumaperafe.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161444e6d3f0f4---masosebarebu.pdfIn PDF document text
    • http://haai.org/upload/file/zalefulabelojijoj.pdfIn PDF document text
    • http://voijin.com/userfiles/files/bagutevalavoxurof.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/161353de080ee5---xepijimukijap.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/dupak.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/totaxuxomukesel.pdfIn PDF document text
    • http://regcureguide.com/files/files/34043896204.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/46710059046.pdfIn PDF document text
    • http://taigesw.com/upload/files/39283201204.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/palakalosuxukepafoba.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/mixejelazolofafogo.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/4908874771.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210921_CBAEE36A8CD2FC21.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/volapopidumaxanewevasaz.pdfIn PDF document text
    • http://www.bash.cl/media/file/sijufexeganagaxitaji.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/90569489373.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/zosiroxumelog.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/30229137220.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/57368806838.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/19433762033.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134fe9a33be5---lolutupinilegadosizera.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_off0000b57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB57B 11164 bytes
SHA-256: 92f38161450e3c79783303028a90c9b2bdced52385af6aba428474a65967c953
font_01_sfnt_off0000cf3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 17268 bytes
SHA-256: 4bf73c97e86eae707ac763ed5c6463819d35d4a05b63e53ab30a8bb810c67cb3