Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5201ee0ea551fd6…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 14:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9eac48215ec24cfd31f3247b75845c0c SHA-1: a09d06ce14467a83e09dd18f3bb70729367c9e44 SHA-256: f5201ee0ea551fd6d3b7b04ccf4175cf65cfd9e96a91451f3d5af1912439ffe2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://webmenuplus.com/images/file/vufenorogoloturave.pdf In PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3812d8ce1---6014895027.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e17ec5229---tuniragotevejiwu.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e9640c784---mumozidaliwinor.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/lofaxularanagokulupuwadok.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/8340cc7a8fab35253ee6507d0af580e3/kitapeledepera.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/99174054420.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/zurop.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/duzurop.pdfIn PDF document text
    • http://soles2walk.cz/data/file/pumoxodemanikowipikisoved.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/3cda74cba9b4f513873c3ae5c2b2e42a/66276177171.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b294af9a97e---xuvidatisuzizefalodenumok.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607522ef9b8e9---tijizabujumetone.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/suvbugab6qn72d8h6gb3pllum5/sirofarogonuzopuzisazuwid.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/69932646171.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/bugaparikuvelibiga.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/timuvikudepodafipijulo.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/84073645070.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab940521063---livojojifusijugutir.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/wexafubam.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832aa44d4cb---49205652662.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/vutobimidurunukatojumamik.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/32772236179.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/00f89186b46cef7203b88b17aa092ba8/sirexenodukawanaxumo.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3291d46ddab34cf3e22fe07a386c8500/92610613968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=highlights+magazine+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/111d0388bdea5f7032fad290ef76a5b5/gevilatojava.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_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 10776 bytes
SHA-256: dd62d4ff98e3fc75c07e04e0ac3e8de08620bb39afb0f3c25c07e38551cd55f8
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 17548 bytes
SHA-256: 35db6b37b78ce193a033124114d6803ea50fda1fceccc91b469426d868f239b6
font_02_sfnt_off00012d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1