Malicious PDF — malware analysis report

Static analysis result for SHA-256 803ff9a2f88fbb1e…

MALICIOUS

PDF

88.1 KB Created: 2021-06-29 05:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 09101473f592909ef7bdb192e38b5e11 SHA-1: 63ed5201e735621c9f944c3ac5cb4a2289e37de9 SHA-256: 803ff9a2f88fbb1e7f57cd773c5715cf5dda582235503f32ffd6997cde96aaf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=stepmother+and+daughter+lesbian PDF link annotation
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a06a2b2d273---masib.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/gl2e68oeas6l07kupc7bfeqrd0/15053206242.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/537d412ccdead6cbe49b36fd754ba10a/fexawegimujiwojis.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/ritanusenasumodazog.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210617_010809.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/53297042807.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64600415d4---38998616489.pdfIn PDF document text
    • https://tangentemag.com/img/file/96322568307.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/594a1fd24fe0cc8762fc5164af2e95c2/nutotugunelumokarosufiwu.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/4dsbiitnue9aivuc73tm9su5re/93037543890.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210507140528139.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/6b47ad71919a6a310ded85b9b3f2f203/30287794752.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f7a991fb---71535408992.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/dc8647cf0c3a4393c629be5574709c0e/gujifapapobepefufobebumot.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cb7ede080---67327604242.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/zarenuvepefaxebabir.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/fdafbc399af33e57b2b1396afc106088/sotedisusomef.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/6v2u1gv7b7j91u5t37uv4sgmm0/tozopefen.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/zoxajagazuf.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/59056615663.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a403aa036---57158448825.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bd11d56b2---jilinuwuxotenik.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/94081401165.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7c6a5b6b4---pomebamomuvaw.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/kg78atu8b1fektipr2sjo8h49t/memutakebaputipemavowi.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_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 17156 bytes
SHA-256: 6f5d13ad8378e0f29d7039430610ad29eb3d4b6a31ac62001a7b0e5abe501bfe
font_02_sfnt_off00013861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13861 11152 bytes
SHA-256: 75a9ec21a49be83983c9f6f1fe690aeb99f2b6d2540f8734417a615412205e78