Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9f9c55f96bc576…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 13:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 73443a0c0bdfcbf388445fd49453e157 SHA-1: 863e461c001b9b343de57b45fdad66fa01459ab6 SHA-256: ed9f9c55f96bc5767cf12cbd5a132435c9c071c91c56b014a54a8e6177038d0a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The embedded JavaScript is likely used to facilitate these redirects or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://queure.ru/uplcv?utm_term=wwe+raw+game+for+android+free+download+apk PDF link annotation
    • http://hyunshin.net/userfiles/file/1279653450.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/34ed655dfcf183248f9e39eef627b1ec/mepomatatokived.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/xidomaxokuzopebexuvawu.pdfIn PDF document text
    • http://ombs.ru/uploads/files/26459367691.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613faecae8724---25917525727.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/mudab.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/23119318820.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/48586326305.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/laluzisisoxukalobulenod.pdfIn PDF document text
    • http://yljczl.com/uploadfile/20210914084407959.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/35328591350.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ef384227d---70783810512.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/78296884665.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/sexawotubamelo.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/vuwopirawalonubixed.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/mowisezunokokewogolazafav.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/vumekemopu.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/sozewef.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/detosafasirugoniwizis.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/dolivewiniwilafe.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/5056879585.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/loxasapitomesawu.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/monag.pdfIn PDF document text
    • http://mfcpavpos.ru/file/sarutukovej.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_off0000b0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DD 16876 bytes
SHA-256: 61c75430ab9f7da2bd41cc3ebefe766e7a011d47b63f4c17376260ca51ab2910
font_02_sfnt_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 10744 bytes
SHA-256: 2c038b7e536ddb7b6f7378547030853ef03a9f6fc0df1550e9feb979eea43321

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