Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d0d2cec4b6d4f8…

MALICIOUS

PDF

84.4 KB Created: 2021-09-08 15:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 65c1efb1e2377b594941441f9d7fadee SHA-1: fc27ca93d88e0a7fbddef258e23dd7d7dea48d7b SHA-256: 93d0d2cec4b6d4f89576e29954e45b7e19ee51e7805198c13b94243680090faa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, forming a link farm. The presence of JavaScript suggests an attempt to execute malicious code, likely to redirect the user to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ahreco.com/uploads/news_file/78667158477.pdf In PDF document text
    • https://vpmemorial.net/images/file/xodirago.pdfIn PDF document text
    • http://alkanboya.com/files/file///kitipitatajakijol.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/xuzifezisefosokepozamav.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/95848627302.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613557a45b820---80056031043.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5b8b900f62fdb7bc0c9e8752192ad53d/32883918893.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/20660366577.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/23466671660.pdfIn PDF document text
    • https://stotex.rs/files/nanexubunawosagolu.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/vetijo.pdfIn PDF document text
    • https://membermimpi.com/contents/files/jopewivatubavewopese.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/vojuko.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/30369273900.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/64937483208.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136061cd3564---14594770022.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/56075234349.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/95923490284.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/tuduze.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/85864017546.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/22144690610.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/dijovenenurepajepugo.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/34651999472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=fluvial+geomorphology+book+pdfPDF 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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 11064 bytes
SHA-256: 4dc47e788b7e2bc7414e9be0be7f66b2ec4a46b7feb2dff5e0c39e074e260731
font_01_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 18172 bytes
SHA-256: 815375b9ba7f779db72ee042650cb5355cb1612cc268a3a783e980a028486249

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