Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcec42e88d6638c…

MALICIOUS

PDF

81.4 KB Created: 2021-10-05 12:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2756ca79df519f4a15066c6246f93f1f SHA-1: cf8fec0eb2c7e47aba79627ad19f8888d0d117e6 SHA-256: 3fcec42e88d6638c4e74550869937e36720401ffeddf0d79055cc407ddccf6e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, with several heuristics indicating it's designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://millvalley.com/wysiwygfiles/file/nimudowavame.pdf In PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/rowulerutewid.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c839379fd0---piwatevarenewevawavuzi.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/gozoropurupijodupo.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9c4d0c3de5621b248838cda02e0e88b3/wagerofevegopematej.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/30408031237.pdfIn PDF document text
    • http://inphilong.com/upload/files/10920314091.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/gizisenowopamozuwugesuji.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/pujagaresidok.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/gaginutawegubuwowatiw.pdfIn PDF document text
    • http://acril.ru/ufiles/files/tazekuladusete.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161435a5781e8b---87378143329.pdfIn PDF document text
    • http://thedreams.cz/files/wezofe.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/vedejeloritege.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/80566818985.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e8c9eb06e---27866914249.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/jugudenavalopanikarogolan.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1631692873.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/guraw.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/pobalu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c075ae9d082c62700dde6520eb34b97e/zogidonekoreduwolonugezit.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614264d926278---vorujevoseguno.pdfIn PDF document text
    • https://palet-school.com/files/files/29230314762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=simple+letter+of+resignationPDF 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_off0000d75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 10776 bytes
SHA-256: 24461f3375cc3bec3f52965d45bb8f8ef10bfa5e1351a214ea391ca323f33116
font_02_sfnt_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 18948 bytes
SHA-256: c5276b23adfa2dd96c64364cffa7bd02043b496b6a2861df7f0a6f3247cd5acf

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