Malicious PDF — malware analysis report

Static analysis result for SHA-256 636219417eb6bdfe…

MALICIOUS

PDF

81.4 KB Created: 2021-09-13 20:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: fddd1b3284c3c8479588368824059ec1 SHA-1: 42766780d28dbf79e57bd90387d9fc7a5d3f39b3 SHA-256: 636219417eb6bdfe4977f9bc6fd658fc9c002bad0938dd558b81889367e3926b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=jensen+ackles+the+forever+purge PDF link annotation
    • https://reparationmobile.net/userfiles/file/kefogiwizo.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/tivujivuwemi.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/46996941101.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/gaselutezep.pdfIn PDF document text
    • http://santehnika34.ru/images/file/lumirasogolafakij.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/nusuvigokexeva.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/vupalasiwiluk.pdfIn PDF document text
    • http://cloverdiamond.com/file/55498756838.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/xilokaxudelumirebupozeva.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109120752284612.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/41170000912.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/gojigajetuxekasesirawege.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/levopumanabomuvomofut.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/zijanefujukokanisotux.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/28054638353.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/27571676965.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210913081255323294ssv208.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/10924506152.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/zukamu.pdfIn PDF document text
    • https://parkettworld.com/upload/files/pafufobezorosiganebelam.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/tolupelerenos.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/55961589650.pdfIn PDF document text
    • http://cold.lt/userfiles/file/rojagunegutomiga.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/vixipexiratuwedero.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 17884 bytes
SHA-256: fef7fbebbdfb7ad86c734f114f50f5ac38c7a26a409bbf494fa6680b483d150e
font_02_sfnt_off00011e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 10916 bytes
SHA-256: 0beb53d508499ceb3a08ee8d22b7eca55c5f3521376ea11cb79b72fa62e0a37a

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