Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6e423164864847…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 23:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0fa012a480f685394523f5f15b8a8e2c SHA-1: cfaa781ed3cff643c79bbcef469eb90b16c8aaaa SHA-256: 6e6e423164864847f7b4bee43dd27c8d5efc7520f33a7e77ff58cb5eeef29a26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. No scripts were extracted, but the presence of multiple external links and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://www.elshandmadedesign.nl/ckfinder/userfiles/files/24492169273.pdf In PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/62785519803.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/fanawuvowur.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/natefuduzebake.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/12144377141.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303c447173a---pululafedosawewukomov.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/52459770921.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/51040549293.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ca7e57f77---64144611174.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/kekisutojola.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bf55937c0---5142247550.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d830b02e273a6e729a8efe6c04d2e979/zawifidupiza.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/17999460520.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/kirizujaze.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/80670676098.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/54223033450.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/4240030003.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/konatotubusetusavoxo.pdfIn PDF document text
    • https://icbacademy.com/upload/files/15202136107.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcd4b453ab---musopuzo.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/gejitobivimitofezebuwuxot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=is+the+stoner+63+good+in+warzonePDF link annotation
    • https://easyown.ddproperty.com/datas/files/43066125948.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_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 10920 bytes
SHA-256: 9806deeb82a29a91fc9f62e7e302bc2f45a0473d5a02ca2e97bc56ba08fb2cca
font_01_sfnt_off0000f753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F65 17268 bytes
SHA-256: 9c418ad03846064e998fcaa990105acb355e612ad523da672c684f50c76d1425

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