Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54e210e1ae7c4fb…

MALICIOUS

PDF

87.5 KB Created: 2021-06-28 04:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fe6dc806c038a6fac1c2ee9e3c05071 SHA-1: 0522e8e7ebf0afcbc0b20a2317a85f012b62fb0c SHA-256: c54e210e1ae7c4fb9586a33b4aa958de890c4966d7c578b60324c3cc61cac342
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it is designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=8th+new+book+social+science+book+back+answers
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096844c1e0ab---rixajagajobarebovi.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/newekutivo.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/hfafs4q309cqo9ogpcvfnhgtfi/mabozokademesuzavemej.pdf
    • http://falerisztika.hu/tmp/5915916680.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2574af2a6---60663416865.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33e4bd97f6997f97fb226d43f674bca4/10381538454.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080456510dc5---63503190838.pdf
    • http://lab4050.com/upload/editor/file/ninexugefikuma.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/7e401cc777dab049f710ce4b4a1089a1/84465026805.pdf
    • http://lucann.com/Upload/file/xemiz.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/24d60bbf2dfe32823f7f7c37753ea48b/nepifugonapekoduvuk.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0d91184ca982b97bbaf82fb519f586ea/29426330568.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/5184dbo4cg2q368sjk6qvdni51/nomekogojipozunolus.pdf
    • http://klpa.net/userData/board/file/xegoxabowuwugotesa.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/91215566cbbce846e0ca48f7dd550b5c/57729667757.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd87e9aa9---45298829195.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/gerotit.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/l4mdc6bhedtddimahbkjbalej6/rodiwikapudunuge.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/5gf5050tn16ue2qdb7929fvgu1/zegeribakiwepepajugarodik.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/887d9f9b42e342a764dc1eec45a35a26/33714599067.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/pvsv5p13nslls09me2muqo87hu/37182295169.pdf
    • http://movietek.vn/hinh-anh/files/99889760556.pdf
    • http://absolutelyneon.com/userfiles/file/sufofawo.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4edfa77e5---ginimeroveximif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1df.bin
9ba7661bd1f2ee302f99e3144a046f406a005560ef7bc492687e3fae6dadaa0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 16956 bytes
font_01_sfnt_off00011e0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 16792 bytes
font_02_sfnt_off00013621.bin
94e2eeaa7092f51f20dc2219aff7a8e5c9a6ce652a56e7d92871c536ae21af5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13621 10756 bytes