Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6775f75d1d8c76…

MALICIOUS

PDF

98.2 KB Created: 2021-09-04 19:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4cd61bf57c7135f8d8727aa6cb669c8d SHA-1: eacd207286f7d30b0421be80f9f05555ead12860 SHA-256: 6f6775f75d1d8c7691197ea8fd95fc825e3424dedc6557c3f9e1ccd358ec8c5c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • 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://pixomot.ru/uplcv?utm_term=lightning+web+components+guide+pdf PDF link annotation
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/lf9gqu72ev4ftkij0ec6b3ono7/luxajaxakixiw.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612508b8f2d15---betapatib.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/84vrg4ed35m9lgg9ck5ip69v55/7114132756.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/sidarixuwogojenifu.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/27345032009.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/26847009772.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67066221152.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/pijufodewelefixujudo.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/konabodoluvufumabavekas.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16087476bcdd49---80647087198.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/49864369029.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/sekezekenumi.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/66877299755.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/d2a39551336416e85384bb276f132343/zudumijovijegoxuwonegobuk.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f27e20dea---61871490437.pdfIn PDF document text
    • https://drlanda.hu/user/file/xamavexijadigalafo.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/31397793450.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/50784811286.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/foziz.pdfIn PDF document text
    • https://stopserv.ru/files/file/17865268800.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/15323852361.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/29250359127.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/7839211928.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2a99aadfe16bbd236079f353c80a9141/590645548.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/vetopiledavunetexogo.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_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 18980 bytes
SHA-256: 2eed49a16d98d353121971e624b9c0960405ce6302ffc748b6a7e4191cf14868
font_01_sfnt_off00014a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A3A 11040 bytes
SHA-256: 740bfe9bcb5703e54fc81e52627cefcf5f1e58356015699d81bdf5ea2ed01014
font_02_sfnt_off00016361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16361 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1