Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2cfcd96f4ed4c9…

MALICIOUS

PDF

78.1 KB Created: 2021-07-29 20:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ed670c63503b02bc70099cf3af963e5 SHA-1: 312d5d6e434d008fc83b10cf2e03324138466c9a SHA-256: de2cfcd96f4ed4c99b6788d85563bb02ce45984b97f3fef75a760be00b9fbd7b
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly indicate the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8623

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=android+extractor+apk
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f24f5de574b---raxax.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b83c223d0---tovowugutitenuwosuwili.pdf
    • http://mwflower.com/upimagesfile///34406728929.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53551f0ae3---wonuriseg.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/34aef565a23808a3ab7ef15e79cb067e/tajesozusejolidipufawege.pdf
    • http://musorcentrum.hu/files/article/file/vatagenejepidubepufip.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16094b6479daf5---45895930356.pdf
    • http://birzebbugastpetersfc.com/files/file/merojuzuzefabuvaloweferu.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/fc5352be30c665d4b2a687e0c401f0b9/71681837433.pdf
    • https://cplastik.com/data/cms/file/kelenotuwuxujipumexijido.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/754tbf72p2tn0ejph5lu8jemnd/vomegasob.pdf
    • http://huron81reunion.com/clients/f/fe/feec28e48c841af8be4ad6373737a022/File/nuwibila.pdf
    • http://spiregene.com/image/files/20210713_144510.pdf
    • http://lpc2529.com/piceditor/file/wejenijejukutofudir.pdf
    • https://bistakalikotenetwork.com/userfiles/file/nepuzusowilaxilubor.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/fd9f2f533cf6c2ad5cefd4330b991753/guvomatexabaz.pdf
    • https://www.passion-rnd.com/upfile/files/2021/06/26/22601629368.pdf
    • https://jobtiara.com/files/files/kutan.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6462732c9---6195997301.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae7d452332---fepibuz.pdf
    • http://chataphan.com/file_media/file_image/file/91563305143.pdf
    • http://muzycznescyzoryki.pl/userfiles/file/70098628797.pdf
    • http://clinicaveterinariaalbese.eu/userfiles/files/wemokagifop.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16095c8b1f203d---87324871996.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/398osk9v3smvjkvec94bt6g1g2/wetaxegixezulozuse.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f536.bin
0f0a837fd0b2f4525df6869492a2fdb55219a7f168ffe1439b95b11b67b8dffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 17508 bytes
font_01_sfnt_off00012370.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 16792 bytes

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