Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d9fd3b4f7d7b7e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-14 07:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38ad4f2bbedc65e2568f099a0b89f001 SHA-1: 37f1b4799702d153ba6b406c7ce78b6657c3b77e SHA-256: d9d9fd3b4f7d7b7ebe2efc1ba29c1ba3c440184534c68e866ac72e7728414f1a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of malicious content from these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://eunlocker.com/Images/Editor/file/74382927715.pdf In PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/38772372473.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/kosawatarunavivi.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/73536819191.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/82640171442.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f7d9843aa---85605975562.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20210902file///32251270772.pdfIn PDF document text
    • http://minipit.com/data/files/9315470706.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/75817016171.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/xewen.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/97899796285.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/rikiwadebo.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/8554207036.pdfIn PDF document text
    • http://mq-water.net/upload/36101567482.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/76070428553.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33379367621.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/44643864004.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/zezuvorisimaru.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/lojed.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d261beee4238e1020965a03bd3c43366/gewope.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/joxov.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/42624432370.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vuvuwalalenosemamed.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/10551228055.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/26162619935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+get+all+deleted+contacts+back+on+androidPDF 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_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 18080 bytes
SHA-256: 3d6552dac749919cc01f765fba2f0e082a64c8010d33a0164b22994e7c8e988e
font_02_sfnt_off00011c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7E 10856 bytes
SHA-256: f9cfcf9dc4316c4600f8d425186844f41bc387d0f38b28a1502aaa926f77b0b7