Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb10e791c0d9da7…

MALICIOUS

PDF

86.4 KB Created: 2021-09-22 13:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2bdf18a19355e5a110d5c69e938e4474 SHA-1: 90969a0031cbed9462b66ffb7df6d1d7b3d4e4d2 SHA-256: eeb10e791c0d9da7a0fd4702d6bfab0f17b2b5bdcc330fecd98e7dfc59a4b335
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hoshitorionline.com/uploads/files/40367577070.pdf In PDF document text
    • https://2acontractor.it/images/file/vezotobufoladuwofiv.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/10908919097.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/fisonapabexujupupivamata.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a66e5930fdfe7eeb2fb4a093fbf8d0c9/59350132829.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/39254425482.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/87636351248.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/valomupawiragagonatavedan.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/fowizigazivumawezu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/1d515cc6347409bd6a454cc4dcaa23f5/19626014072.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4b8d9295b---kidunafalezidanojomaf.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/67079846320.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d40864044fa40bd67f182e1be6653ade/xidofesegipiw.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/82874302219.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/26925130710.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1614907d3066bf---tarijuruzeluwibaluko.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210906113518.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/fukalof.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/49349478218.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/akjr89vs09scug0th02bvmn6sv/lomat.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/domobuxe.pdfIn PDF document text
    • http://slipa.site/0429/upload/files/68003936833.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/joposanutit.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/tubogawazazow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=games+like+minecraft+with+better+graphics+for+androidPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/vatiwuxutarizaf.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://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_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FD 16664 bytes
SHA-256: ebe4ac151f6c59c0041f5fb33f9bb8ba6741f3b6fe21c0d0ca0f54ef4e976b20
font_02_sfnt_off00013100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13100 11424 bytes
SHA-256: 7097e4262ca11cc90da4cf6df24e327313c49bd6fb9387245a248768f59909d6