Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f942343489febc7…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 22:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ad2b6045e82edfec39a6de11bbddad99 SHA-1: 2164098dd7287bfac28fd23da55656f3c34949a1 SHA-256: 0f942343489febc739c307c505ac302aa7f789cf91b5d502ccbd2a19abf27787
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution vector. The document contains a link farm pointing to multiple external URLs, some hosted on compromised CMS uploads, which are designed to redirect users to potentially malicious content. The presence of numerous unknown URLs suggests a broad attempt at user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://luxlustry.ru/img/upload/94014151198.pdf In PDF document text
    • http://www.pattyn360.com/upload/forum/files/74172075016.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/85273981955.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142394d164c4---lisamikenomuduxudonamaw.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/wosikonisu.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/vamubewago.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/59088474931.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/zabolumejobapufig.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66550096298.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109180504133371.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/wotaregodinekab.pdfIn PDF document text
    • http://inistor.com/ufiles/files/3083918984.pdfIn PDF document text
    • https://harley.dataroom.tw/upload/files/getufipazez.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/kirexabirofamevuzajekil.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/21678970765.pdfIn PDF document text
    • http://ecole.ru/text/images/file/28726582363.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109101135214888.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/dezafarujovukiwinepo.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/bojojosetaj.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/53609538129.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16148fd659a07f---belevejomosarowu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161502c1c30752---lejoduxi.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/18513590952.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/41471604501.pdfIn PDF document text
    • https://merlak.ru/userfiles/file/21570818182.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/81373702641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=football+cup+2020+hack+apkPDF 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_off0000b46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46E 15100 bytes
SHA-256: 1e3bf613ef6b82faa1f11e65970c9ff805ac221bb0f62dfd5efbdf26846c880e
font_01_sfnt_off0000dade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 10424 bytes
SHA-256: 3b17313cb02de290fe4f0340aee900ffe514a5196a8ddab34c1c7d294d9e2dcf
font_02_sfnt_off0000f279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF279 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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