Malicious PDF — malware analysis report

Static analysis result for SHA-256 47607f598df404cd…

MALICIOUS

PDF

87.1 KB Created: 2021-09-06 10:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 92301c01e762d4e6720b3e58dabb1708 SHA-1: 9ab951c91323d9c642daafaf9bb52bc2ab374e52 SHA-256: 47607f598df404cd43f97b2bc319fc28bfda6c2814f7819038a5ecd44db6ba5a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=samsung+verizon+network+extender+2+manual PDF link annotation
    • https://loctra.net/userfiles/file/raguzarutikupimebukugigi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a56b4ceccc---nowezodogofazedenobux.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd982f039---folopujamawasefilun.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/retasamikovimumolur.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/gebuxurazolamasitopoxije.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/medaperunemikipid.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/toneniwajuwovozu.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/fanidoj.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/47831941862.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/nelusulapig.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/rarisuro.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/25963568780.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070f81f24d46---69362619212.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/qap9jtf25q7fetnbke7qldo3h4/gikufurodij.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec68cf1de0---juwixulisasuguvekavutop.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/falira.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096ae52a45d1---wogodoze.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/81818862448.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/068e006b23af7a7cf2110e28b0816645/tewigutuvebijitubup.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/18251887736132f22ac8337.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/sotoweli.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/sikimogugu.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/padutajitigisaworixipu.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a27496b8e37---62197973940.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_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 11292 bytes
SHA-256: f634857aba24450bbbac17cb636a26773df109df7750795ae157327fd3fe753d
font_01_sfnt_off000107d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D8 18100 bytes
SHA-256: b6d36e6d61202842380b38268a9810c1e783a2e6873e5c971c7321ae27d08f26
font_02_sfnt_off0001365d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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