Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb65651a036fced6…

MALICIOUS

PDF

83.0 KB Created: 2021-09-09 07:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7636ec8d4971b4be9df67fb692120085 SHA-1: 919b6a6b6523d52f644256095a47c245ba55efd2 SHA-256: eb65651a036fced67e51cf05ab6fb7517b53034c8bd00451a66ba586d35aa6fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=android+setup+app+disable PDF link annotation
    • https://tylbm.com/Upload/ckeditor/files/24829575623.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/vimowasakubason.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/dusosolekurusetabinoda.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/22903446494.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/naxetiwezufu.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/lepevudi.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc20a735e5---2192468211.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/xavuwipuzazagufowosowikip.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ourg9qcr85teqq26ga0pc0b7s3/kepibozobepekisasoxazopu.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/50253162854.pdfIn PDF document text
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/53804285344.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/80200489171.pdfIn PDF document text
    • http://cartopack.be/Images/file/30218423033.pdfIn PDF document text
    • https://ottopianos.nl/files/zisapefevatupefiso.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/57350015696.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139602f009e4---lejumutekokozitanej.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3n3b3m9ikt0eptpgbttnkvf6eh/guwufoleze.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/maruvirorepitosifimapu.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/sanuvufolojizixipawuxovu.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/34151996235.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/61977822003.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8dvo13mclttm7qb73qcaqhe5i0/550273294.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/kovigopugivovezokejuvemem.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/wuvon.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 10608 bytes
SHA-256: 8ce8c54d9e5de14b65ef7b4056800996db3f56485ad62df77fa07ce0f28b748a
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 17188 bytes
SHA-256: 16cb945d4f3bfa80de6a470ffda9d274ceaefdee88b69afefa36b7169607472f
font_02_sfnt_off0001260a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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