Malicious PDF — malware analysis report

Static analysis result for SHA-256 0192948989bcc5aa…

MALICIOUS

PDF

93.6 KB Created: 2021-08-12 02:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d9942ca09a8222b72802dc8cbc73c0d1 SHA-1: beaffae5ff94479615ba4dd882b8e81118f0932a SHA-256: 0192948989bcc5aafca92ac35e9392e27792597700ac95ad681e670fc2219500
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm pointing to compromised CMS uploads. The document body is heavily obfuscated, but the presence of external URIs and link farms suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and heuristics point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf8272da3---27822475924.pdf In PDF document text
    • http://hayatteknoloji.com/webimage/file/43001980617.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/47856163306.pdfIn PDF document text
    • http://ipceurope.com/assets/file/juwivixenaleba.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881e175f40d---93995042529.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/39709917124.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160862a8f3fa27---sigewisaganev.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/vobuxulufolegunaxog.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cad0480d9a---72812172384.pdfIn PDF document text
    • https://siroyensao.com/upload/files/vuziruzexijigodono.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/wegenen.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/39357734002.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/efimitazeg.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/2900fb5eb6b672dffc82aa6f2e7b7fd5/lujubenejogegexexume.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/u6to0utoj2f2q7uls99khk2mhh/70484728651.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b33393dfa---78922630795.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e88e9acc2---32716700483.pdfIn PDF document text
    • http://proxima-design.cz/files/file/zisize.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d7535cdbf---gabekonatojerekog.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/wovanududutixifok.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076172718538---fikukanela.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085191e954e3---wubakodukidatiwatax.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/numeroni.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/67531141282.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/fa1e86636ccb955157c7bb96bf5b7fe4/96907294693.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3528c3fb84---62534253821.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4433859d3---sonejulizuxen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=budwig+diet+pdfPDF 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_off00010c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 17340 bytes
SHA-256: cff3cd8b4ff9f52b0adce339e57fe2a87b273de1517a0ea7ed09318b2e45bba2
font_01_sfnt_off000138e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E3 10212 bytes
SHA-256: b83c14381b7395372ca6c50ffe61b191cf5a4dfebc79fc45642ca300481afb94
font_02_sfnt_off00014fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.