Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6f63eb6f999698…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 16:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 14527a4a50d3f53019fa44fe21073abd SHA-1: 28f823c7056303f26f7ed0f7638e8fa7c2687653 SHA-256: cc6f63eb6f999698b2aa020e2bfdb3e60d30d01ffbd654544537b530841e8458
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://pnmanagementsolutions.in/uploads/45469171996.pdf In PDF document text
    • http://flagrant-desir.com/userfiles/file/85775385034.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/nesakawexeme.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/zuwukigivoda.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/11215816825.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/78925135168.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f582446e99---bagidonizu.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/6jmii1qpl89eecshlsqnuh85b5/zezumiwekifas.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/bigazopowuxo.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/45505701261310ecd00e75.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/xagajobegezipasogug.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/66296465184.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/78900820796.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/doxerefifub.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/fetusidenetusomoxu.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/vekalagapelorevaxevod.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/sepepopifilig.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/dugizipatiwuwefapexozixif.pdfIn PDF document text
    • http://rentaruedas.com/files/others/fowezidam.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/36649668286.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/12870672453.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161358b76cc896---71533575223.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/kuladiloxipedonirevo.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/88166964992.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/vizijudopalugegavizod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+minecraft+pe+for+free+on+androidPDF 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_off0000dace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACE 10824 bytes
SHA-256: 6b9f5f71674fad1ae9baf005767fd05b4a0e12840d9a8a00f775a86e9c7f34a4
font_01_sfnt_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 18572 bytes
SHA-256: 64f0e0da88da3e5859b0115ad013800ce2d8a97095f9fe827a3492847723c013
font_02_sfnt_off00012379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1