Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd1338fdc733680…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 21:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5498a4f7481d91f6c0ef468f2bba8238 SHA-1: 6ddcb1e07fc310a9715c0a354e22c659242ebe2c SHA-256: 3dd1338fdc733680e0c002f1466426712e00e592e0f6ceaa72600053678e189b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous other PDF files hosted on compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kund-in.com/userfiles/file/jonilokevu.pdf In PDF document text
    • https://yepsell.com/userfiles/files/93551550274.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/bigixijid.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/75fe16e0578f99c91d91a3d0ac3e68f5/51994590566.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210604_35DA64E5FE9A3301.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/5dbc9a8a4b2ded1e054a1a4cfd1251c6/37279761633.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/m91ng3rtf41umpbanb4le6hkc3/60184202011.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/28583125430.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/jmuq2t91tuk7u0kupn5s3cduft/83171194240.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1dccef987---wepubomarasozunazosob.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42373be5dc---merapo.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/2b69e84b5282bf454211c07d928e40c0/68681941606.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608650fc914e6---vomonalagezugal.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210624104140.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/26963930864.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/da33e3369a8210129b7d7f4908c59ab2/42349119415.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/5stkp7npnjdou8p90ib3amu5kn/52077631671.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/sakevuzibebofuj.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/84955320464.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bd8507380---lorewepamezilaboxoje.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/79423872039.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/97776743990.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/xiwefisujajagofogugud.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/58748523477f199013020e556a2c9347/kikowituto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=glossary+meaning+in+bookPDF 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

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_off0000ebdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 10740 bytes
SHA-256: 96494d0749b8f9938f8de1f40742d9edb6467d301abea724672f8ef28bc72cc4
font_01_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 17768 bytes
SHA-256: 73769856c597273969954da985f76e8002f66b6df3a424feb3349caa3b580206
font_02_sfnt_off00013319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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