Malicious PDF — malware analysis report

Static analysis result for SHA-256 7881bb573692a2a1…

MALICIOUS

PDF

107.5 KB Created: 2021-04-17 03:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56e2a8093803f53699d210b0052e7b82 SHA-1: d564f0436b8494678818cedbce17fe404be6493a SHA-256: 7881bb573692a2a1ca6f7b285eee7f03e83e87825a225e9a416ea6c39a99edfd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme to host malicious content. The document body, though partially garbled, suggests a lure related to 'conceptual schemas'. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=clases+de+esquemas+conceptuales PDF link annotation
    • http://pifofobexaxel.mypressonline.com/epson_stylus_nx230_ink_walmart.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/63787477713.pdfIn PDF document text
    • http://natural-shop.info/munavei45u0.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/gafokogiduwoxatafamorikm8li0.pdfIn PDF document text
    • http://tipografiyav.moscow/folk_songs_pleasevc6v0.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/6th_grade_math_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_601f21c16fb66.pdfIn PDF document text
    • http://tapidiv.medianewsonline.com/asking_questions_in_english_worksheets.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/food_safety_certifications_llc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_600cb7273a1dc.pdfIn PDF document text
    • http://neojust.ru/ellipsis_tablet_keeps_shutting_offked2v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5feed9ee899a5.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/die_buddenbrooks_buch.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/29171360970.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liroporuki.myartsonline.com/online_banking_services.pdfIn PDF document text
    • http://jikolelekad.epizy.com/rabefoxonepoze.pdfIn PDF document text
    • http://zimunumiwu.epizy.com/wituz.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_a941e3447abb438da643d5710eb60d76.pdf?index=trueIn PDF document text
    • http://kabudevegal.epizy.com/72526283840.pdfIn PDF document text
    • http://bogazukutij.rf.gd/sazikesitefafogaset.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_2f9ba65f265d4ee6bc8aa5fa6c2dfb06.pdf?index=trueIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_80028509119b4dff81e12a856c0793e0.pdf?index=trueIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_e4807b1fffc346889ea3040ba8526426.pdf?index=trueIn PDF document text
    • http://kogotiru.myartsonline.com/gadirupaxixafuzubin.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_0bbc089bc3d54f67915085fbfd60139e.pdf?index=trueIn PDF document text
    • http://tosabukevosubar.myartsonline.com/18845943021.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://scripts.sil.org/OFLIn 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_off00014e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E74 5152 bytes
SHA-256: f52e00d2e6bbe10d758d487129e7db226d38a4256cf8922efa119d4f93753c23
font_01_sfnt_off00015fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE7 13308 bytes
SHA-256: 1d0a58416e01072e657bb273209b40074c97743ddfbe363cc79b98b7a663563d
font_02_sfnt_off0001898c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1898C 16132 bytes
SHA-256: 242fba77d96c5ab84cd920abdfd8b8278d36c96caf737e409af15d8068860fd9