Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ae5adcc16df6d2…

MALICIOUS

PDF

87.2 KB Created: 2021-07-07 12:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5f3911c8fb4b9e6c33037c8f5e8b56fd SHA-1: 61d73e4db985fd9dda32d12a3db4ee24c05e5725 SHA-256: d6ae5adcc16df6d24a3538e28c46362ebdce34b4b97622075ab90062862bd4e6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://inwebjor.ru/uplcv?utm_term=what+is+bachata+dance+style PDF link annotation
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/5abb8bblhski5fpper4ttiu57p/dovirivinurunadid.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/mibezugolix.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0f173d2fe---puzukojivabeve.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/gapuxukaligamato.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/gikakakunef.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/85534658353.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a13a9e48cc84f203bc39782898b32ebc/sijomokutexemosadafurupu.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e97867b5ece374e7eb33711c5a44b7b2/13843322890.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/petenanofowi.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/pasofavutadevulagamun.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/76850319418.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b30cb2e5766---85721312296.pdfIn PDF document text
    • http://charivne.info/images/file/16843901320.pdfIn PDF document text
    • http://hibertek.com/image/files/20210626_194407.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/roxoguf.pdfIn PDF document text
    • http://deauville.ru/files/file/29026359211.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081d044ea817---93423791659.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e49d404be01da3d4b3ac941ed01187ba/64139823837.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce2faf49c---vodudegepadapavetu.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/281030201476.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608255751240d---56971970020.pdfIn PDF document text
    • http://armanetti.com/images/sezenonogor.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f853451e8c---64875359069.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/d3cc1408541f041191433529884c0d50/senedijepozuwukadujo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160791ecb9355a---90436204326.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/0ad95b5524acac49a4d5ccef9c991f45/62064009750.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_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 16996 bytes
SHA-256: 11d699ad38dc0c4a0adff26ad04294d0406d2642e7a1ab01c631747ebd9c3d8a
font_01_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 10492 bytes
SHA-256: 31b670d1f588ccd72bd21b0a4cbfe5a10c7078038810cc6ddbae4d99e97816f5
font_02_sfnt_off0001379f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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