Malicious PDF — malware analysis report

Static analysis result for SHA-256 17362471b4d4e3ad…

MALICIOUS

PDF

80.2 KB Created: 2021-09-18 13:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 458f7178170a0bf31393834d12b262e5 SHA-1: 5d1d9a1f7dafea4403062f5e6e425086903b9c50 SHA-256: 17362471b4d4e3ad76768465b1d958a809665a70996e6149dca36762a83b89cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of a 'utm_term=free+genshin+primogems' parameter suggests a lure for potentially valuable items to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/68492b9d07ade11b6b4a893e5fc4c073/87741315246.pdf In PDF document text
    • http://kovospm.cz/fotky/file/xogogipej.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/pewuweru.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/tofunazigatiponewip.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9adf46348---78172481709.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/wolawinajebagatuxijese.pdfIn PDF document text
    • http://thepducphat.com/upload/files/saxaxujebegatisa.pdfIn PDF document text
    • https://vestol.bg/files/file/16462341419.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/vedexovexitijozibutipidaf.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/sojagulepa.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/bogoxidipuwinemafuzipit.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/toridoxukuwetis.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/komit.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/jatododorafamelara.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/27099350468.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/galudopojilupukok.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///jomaraxelufawu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161341c59921d3---31207363992.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/48594708256.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/cd1e881fd0a7c6b0ee84e41c527a68ba/91931460414.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/25938192635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+genshin+primogemsPDF 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_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 10368 bytes
SHA-256: 6bc1ecda1c21d94f76e9d25a220df8b7a692d6ad35a3cafd3a0a63027214b521
font_02_sfnt_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 17444 bytes
SHA-256: 6efe48f2d0f2fd80d4c036165fcd67539ff09c9cb8e165b9f481b9db76faeadf