Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e8d7690c714284…

MALICIOUS

PDF

72.9 KB Created: 2021-09-04 23:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c9d6336cd07d74f7965909950fe45bd3 SHA-1: 6bd2de572d7bc7fd65b51a7bf46863f063ca8c38 SHA-256: 95e8d7690c71428479bb2f441bcdc8db4d3594b8dfca6f7cb66cd1c846e213bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites, suggests it is designed to redirect users to malicious or phishing content. The primary attack pattern involves leveraging these links and potentially the embedded script to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://accuratesearch.com/userfiles/file/patavuxajo.pdf In PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/d7b0bda1b8d13b6b1fdb56b10bcee6f9/nogosadijobizitemaje.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161213831c951d---jifunulute.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/femisetelosuzamo.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/nepanedituxadekaj.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/39318956382.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/fd15e458d0432ec8c16ca0f9ffa47c2b/jamemitoxelepe.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/kusifedikorar.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/kogetezam.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/58450783562.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/74441638499.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/mupoxutiwi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/cbge1ras7fgdbq2aprngr1ipch/domal.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128cc8e4a6a9---95953583960.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/16910357458.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109021707384728.pdfIn PDF document text
    • https://ckmandarin.com/uploads/memazavodolifudebidiwewaf.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9920e7d577---26252468003.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/46081709842.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/bisinas.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/vafoxurupugifigisodaru.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ghb2qjs0f4g5khhn9ngpofl39c/xixebaduku.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/25745658707.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/68905104994.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/feredutozejavopivewuma.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/gazaxebirizube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=operating+model+canvas+book+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_off0000b8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EE 11284 bytes
SHA-256: 26f0f6fd48c526ff25ddbe6f2405425656139f63fecc3ad620660f43a626fa9e
font_01_sfnt_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 16816 bytes
SHA-256: 9f30e83e305c050e213a6d1c4b36effd23df45d4fa98ab25f5122ae0eaa0e32b
font_02_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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