Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed6fb80269ec75b…

MALICIOUS

PDF

82.6 KB Created: 2021-09-04 12:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2a6ccb1e2169929ec9fd33551782566b SHA-1: 92c5d7d89e5b7ebd386ede2bd52b37c61c2e2c8e SHA-256: 0ed6fb80269ec75b5116a8ef4ed370195cd90c954152b14dcbceeb0f261df461
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of embedded JavaScript (T1059.007) indicates the potential for executing malicious code within the PDF. The overall structure and URL distribution are consistent with phishing or malware distribution campaigns, often delivered via spearphishing attachments (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f01784a1ba6---12684775054.pdf In PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/24852425051.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/79686370886.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/78049290199.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/50892047849.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5a4c33a94---21200327107.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210829154850.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608901584d422---vaxuresotavevitezasora.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/28339050508.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/vekixevatopajez.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/gobaferen.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/gomebunisogul.pdfIn PDF document text
    • https://scriptdd.com/_file/file/40974204712.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b038bebac---razigirevokafafa.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/tinojafojujevukizamu.pdfIn PDF document text
    • http://dringraldi.com/clients/7/73/73ccc230e5ee2b020474e4a43bcd07af/File/53720812732.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/t2cd18n8fdsm0he1cjencoj0j6/mamurulekejojajovujafurut.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d49e33e79c9---bufifivexoz.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/23465433153.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1621690213.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/1a247ed2cfb8e36754e47ed1baa6aebd/rewutapifubi.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/36643799631.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/zedaxijemulomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=differences+between+descriptive+and+inferential+statistics+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_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 17188 bytes
SHA-256: ae89c0ed20b24d63b4ee2be25ff92698e499c850f044abdcbad1e7880e8c52f2
font_01_sfnt_off00010b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B07 10788 bytes
SHA-256: 6c3bbeb2c3a7f41abd505ad14444d4882531a426bde595866ea2d7b3463e4e37
font_02_sfnt_off000123e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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