Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e797012e6cae185…

MALICIOUS

PDF

71.5 KB Created: 2021-09-20 15:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: acdaeb12591cccf0edd474c4ea094a35 SHA-1: 3598335bc1e9a42a5f9d793f36e3fbc789ac70a5 SHA-256: 4e797012e6cae185161ece18685c1e20d2fbe9144a78b742a901cb297097e068
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with many pointing to disposable or unknown domains, characteristic of a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document's primary purpose is to host a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mepho.hu/ckfinder/userfiles/files/xazokeridalakodidira.pdf In PDF document text
    • http://alacartedesign.de/userfiles/file/dapamuvutukipuden.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/77225270714.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613df44f971cf---27668886155.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/88644158638.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/91029758612.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/41021862124.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/zodikewemejotulewo.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/89284028000.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/23996140035.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/molurovi.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/16187918628.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/pezebuvekuniwuvobobodoton.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/rekugog.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1e734fda1---jimexinamuwiwiwapaxi.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/80151759286.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021091315093373499.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/63092612896.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/55778337908.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/48488280853.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/zusubukivobaratafuva.pdfIn PDF document text
    • http://yoron.net/up/files/bamonajok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=samsung+galaxy+tab+2+wont+connect+to+internetPDF 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_off0000b464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB464 16016 bytes
SHA-256: e1cc214d5eb7e620287fc43aa5a18b73f95aa336401ee9b84c3baf6e3fa7c56e
font_01_sfnt_off0000dd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD77 11308 bytes
SHA-256: 1db42609f46d486d4755b1830bb4819a9c4506e2c8f1dcea555baeb72d3f0cde
font_02_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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