Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c7277b4f580449…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 11:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: aa611a2bfee47af01914e0ab681d9b73 SHA-1: 16164cf46678e7244d4521230c20ef64d221dcc7 SHA-256: d4c7277b4f5804492c67b51fed40a9e929903c275021d2bdb7cef03330925db5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kerryparsonsfoundation.org/media/file/59168292154.pdf In PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491dfb69c43---47184181757.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/pejorijivozatikigisux.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/gawibuka.pdfIn PDF document text
    • http://garderoba.sk/images/_file/wipizametapek.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/kilapotipokexefixefo.pdfIn PDF document text
    • http://marymo.ru/uploads/files/76499043914.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130227d7b637---81446013392.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613313e516c42---11203076730.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/69631503279.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161497f8a27b6c---36518428864.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/68398323761.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/80773703637.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/k3hbkupadol7nr2ia6sqpslfo5/tilidebezi.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/fqcbtm3dp64js26qu8dravk7oq/14025721388.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1632338174/file/70704151651.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/39671108974.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c4ce33224---76905702396.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/41370180509.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/82847072798.pdfIn PDF document text
    • http://shouquan.scarclinic-cn.com/uploadfile/file///602408503.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/21303435835.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/doxodepefibikafiwugezosig.pdfIn PDF document text
    • http://hejia-ele.net/upload/84323394732.pdfIn PDF document text
    • http://vswet.ru/f/zunenosogofofuzumaworejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=watch+my+kitchen+rules+season+9+online+freePDF 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_off0000b569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB569 11068 bytes
SHA-256: eb5f39406caaae4d2d5fd3743429124f00586b3bf2afb8012d3379ae0f5326ef
font_01_sfnt_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 14640 bytes
SHA-256: 0d29049d82220bca16b9dc37ab9faa3f944a0fdca274b5938272976dafb8539b
font_02_sfnt_off0000f413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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