Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67af9e4debdd7cd…

MALICIOUS

PDF

91.4 KB Created: 2021-09-02 22:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38d8e3f283272a2f98c3a15ffe0fe856 SHA-1: 09f4d3cfd6b9d18699045b1abda347f91522cea6 SHA-256: e67af9e4debdd7cd7133f781ad24f7463a896af09cd8befaa9ca7b5d8e5f8090
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript is likely responsible for redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=volkswagen+polo+2018+manual+pdf PDF link annotation
    • https://ottenburger.com/userfiles/file/gorokusavaxumagik.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/33673557252.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/lodelejudod.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/jikim.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/34851383776.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096c3e677e9d---6304857286.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/81d8340db3e2a4458ce34fd8fde745cc/14441719110.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/neworapeg.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f62ca71f636---dikifo.pdfIn PDF document text
    • http://ubest.ru/images/file/33846608055.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/sudedu.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zinidafasu.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7de06d171d---sisamufip.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/40090953971.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/1b184c5cf11cc3d2a04c6a8df4ae6c73/jofuxopesi.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/vikobijovijomenegixufe.pdfIn PDF document text
    • http://goldmustang.ru/files/files/74954903275.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/e7aaa1d587b99f46d9fde12e97692700/6431369483.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/7007ae677da0971191c6c5e7778635e3/bovovalipovizobita.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210827190929.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/jaxozuz.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c931b86c0c8---13129136560.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/21844152512.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_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 11300 bytes
SHA-256: 7ca02e3aba14c1e618d87862a79be04d88dacc61bcf290827c8d61ff3a792785
font_01_sfnt_off00011576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D88 18684 bytes
SHA-256: 52f58e20f581c8999c6de8b0222126943676285505ee6306cd69b9be8165ea64

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