Malicious PDF — malware analysis report

Static analysis result for SHA-256 384dfae64adedb80…

MALICIOUS

PDF

78.6 KB Created: 2021-08-28 15:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e00c9016c587a13d1c446f787125a726 SHA-1: bc0b6963da3dc42d6e36c5f2b7f6f65ebd526d3e SHA-256: 384dfae64adedb80c0bf3acfa72dbde1243286a177803959169cfe81928d0af8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and link farm heuristics, indicating its purpose is to redirect users to external sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of compromised CMS upload links further supports the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://wastran.ru/uplcv?utm_term=health+and+safety+careers PDF link annotation
    • http://arch-teh.com/pic/userfile/14701032019.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/sugisepob.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/43929964340.pdfIn PDF document text
    • https://airshow-bg.com/file/30245454590.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/nejegibegaz.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6462732c9---6195997301.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/majuwesekadito.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/52064391087.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/3t8q48tvp979b46ea49vtj4e13/dufefegozejekomuzulonudiv.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/0lp81u9mq66fqh75up3814h503/17870220559.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e99b704adc---rotuzoriwirilenibobig.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160d7aa2053aa1---gipareruligonagujud.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/20745717606.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ef55a36de6e37b0ce366d0fcadbb42d4/dukowibuwujiwumiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f01e5df391---duviwebalijo.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/xiramivufovon.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2514e72b0d---53445488980.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/16626151107.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868170cedae---80188104450.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/74568796249.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609829d60a733---figokodisavimewuku.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1576b1efc5---jaxukutawuxazaxebipan.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb2ef69c8e---wukifosikodipavid.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/57868239777.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/zibete.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_off0000d2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 10464 bytes
SHA-256: 98a282ab99135f7b67168b1e2462c67f0628fd8267d182cd8b57327efa374f62
font_01_sfnt_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 16528 bytes
SHA-256: e167f3bf602b124eb4c06ff1665eb2e15dbed310991052df188c63f0c3bb51aa
font_02_sfnt_off000114de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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