Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fabd5ce555903a…

MALICIOUS

PDF

80.4 KB Created: 2021-08-20 23:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2017bfc1ed46885e444a2131985ffb6c SHA-1: 418583311d1f2457f8cdcf906b3210e9a66047a8 SHA-256: e3fabd5ce555903a23f3d5ca7316de4a5a070bf9c9d2d69c489685045794dcd9
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised WordPress upload storage. Several URLs extracted from the document lead to other PDF files hosted on potentially compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://metnar.pl/web/uploads/files/notisokivuz.pdf In PDF document text
    • http://risme.vn/files/76622018352.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/29478446578.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/tapumoveven.pdfIn PDF document text
    • http://homeopathyhongkong.com/files/10959475329.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9491d0307---77279727528.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee7b88d946---sugitazuk.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/38833714160.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/305228457b2f9bd8b21abda72ea9d460/zodux.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/966170bc3831289d1ab8243928ced5b8/naxugaduwegugiwimu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af962a7f0f0---zafoloxewusavinofitav.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/jafadasokimukunoxeji.pdfIn PDF document text
    • http://446888.top/userfiles/file/diwebipefatikepejituzo.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/guwujiforeput.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/12804074920.pdfIn PDF document text
    • http://wirheiraten.de/images/file/tuvalavopewowono.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/5f5b3c73951c037a16ba4f97a291e9d8/94589989414.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a365ba0bfe8---84455006184.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/lenufujeruviriwub.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/74597962325.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/keluzegotaxo.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160746132c3366---fijuvorenedemivovafeba.pdfIn PDF document text
    • https://remini.hu/userfiles/file/busixakowinijajulojam.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/xepezijomunodosavexobef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=apega+competency+based+assessment+guidePDF 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://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_off0000d8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D6 11048 bytes
SHA-256: 4be03a801921b6c158d93e2c59564597f7bfafb0fc6345b08027b57f1f35d153
font_01_sfnt_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 16708 bytes
SHA-256: 4fb034d6a26c3166bba5f231ae6a98e52df53e5b9f4f34f42ccc44ffacf36539
font_02_sfnt_off00011d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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