Malicious PDF — malware analysis report

Static analysis result for SHA-256 7465128085c484af…

MALICIOUS

PDF

93.4 KB Created: 2021-09-07 10:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e163bca176f4530433ffe6338474bb9d SHA-1: 0ddea3373ff3baabdf099661b7769b2d467eecfa SHA-256: 7465128085c484af3fcbe6db1c2bdb3e0cd5688e2a4e78e5819a69009107298a
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it is designed to redirect users to malicious sites. The primary attack pattern appears to be a phishing lure or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crysiq.ru/uplcv?utm_term=vals+amelie+piano+pdf PDF link annotation
    • http://malabarisproducoes.com/arquivos/files/51614570569.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/27734332d0a1ebbc1b8740978f8545f3/gekoridakokuf.pdfIn PDF document text
    • http://mfahk.com/upload/files/dutonizeparufupu.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2daa0fa5b---92254104358.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/292859400f96cf641b72671c8e901dde/rudavidezelupisul.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ada020eda---majudadebekiwawa.pdfIn PDF document text
    • http://amandamaitland.com/images/file/61915077087.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610375858eeb8---37226865735.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/92531395058.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/nusilanimikizisefebow.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9cdc0bbcbc68ff2f0a2cca4e25dbfb5d/40518296357.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/83153448386.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/mowimixudorodewapawadi.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/43931719556.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/68275126951.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c962e1d337c---37050770117.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071b25fb1f23---6760169345.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/42773836206.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/43420756937.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/11808911798.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/kabikuxol.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/pojatajamubodosalefogazot.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5nptuc69vfs4cthiib0t777ee2/10367795129.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_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 21040 bytes
SHA-256: e05d07fc7c4c3ea109628d320c1db6b1f6456c1cd3a66ba50ea81c49fa9031f1
font_02_sfnt_off0001503d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1503D 10432 bytes
SHA-256: 51bc6d7750cc25056390ec771f74d1dab64ebc677c37afed4f73a0b5fe0f0bd2

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