Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c98d16617e5841…

MALICIOUS

PDF

92.9 KB Created: 2021-08-19 03:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: c99ff6d9c6ba3dff159affeb7a66b897 SHA-1: 971c763ee8f342d1707650eee64b4c864c69c10f SHA-256: 22c98d16617e58416701b942166681a8cc9fb5dcde271d513ee43d35f3604199
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to other PDF files hosted on various websites, many of which appear to be compromised CMS installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these linked documents. No scripts were extracted, but the structure suggests a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6eada24de0706edbc746f6537b9a4817/96767795602.pdf In PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/bowugipotuf.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9746a0783e---rudekuvevotabepilanam.pdfIn PDF document text
    • http://yalciniskele.com/imgup/file/xalimimasutotilebudose.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/nunidibudulid.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/85205650430.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/76615818429.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f0643a97cae---65479679540.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/ginujupasonawasinaxeviw.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/xegebowenopi.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f7fc72613---gajawipasusogaladupuzev.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920338dae60---lonoxedusesera.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/gawevajesok.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/83eb07e60ba53997ab8ec8b0a3629f33/newufuvizovadiwitomonufu.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/6577667916.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0e9426a38---tujimiviximozevefevipawo.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/fasamodamevaw.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/kiboga.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/watidaroribuxudebegiz.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/bd8bcfc0bc492493a307bb1528e2dd43/82299386661.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0a010d4440670e796f9c6fd788ac2309/pekogukisebi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=la+raz%C3%B3n+de+estar+contigo+libro+resumenPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 17368 bytes
SHA-256: 6c37c0169dc5f50b13d14f2f6f7cbf1e4ca6ddf585f566bc73e50c5bb5d0994e
font_01_sfnt_off00013187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13187 11108 bytes
SHA-256: 074739864190fa0139a04024cd313679278d1f3454e19976184c515cead87c88
font_02_sfnt_off00014afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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