Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6323b2e5fe5a39…

MALICIOUS

PDF

88.0 KB Created: 2021-08-27 13:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 76455a0a4f70956d822bf4d03f2659e9 SHA-1: fc4eaafb10e38d97e4dd25f914fc7bd941fe133f SHA-256: 6b6323b2e5fe5a39a5d6f30e1b118c941e89a59eb3fce07204b79004c532d437
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://philabc.ru/uplcv?utm_term=that%27s+on+you+meaning PDF link annotation
    • http://albatrossmrn.com/konadnew/userfiles/file/67896585157.pdfIn PDF document text
    • http://apsons.eu/files/file/lijonewoda.pdfIn PDF document text
    • http://amandamaitland.com/images/file/95500973490.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e795372bfe5---zumedezokogezapireju.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160764a04b058e---12774225029.pdfIn PDF document text
    • http://cocoal.com/uploads/file/ginizutagosakabo.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091a2949f268---8875625235.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2a19600d---fatukizogo.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/35000729263.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/raxutafesufirubapipunube.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/voxurexelex.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/sitotipowasanunolu.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161152748c42e2---zagadofeditifaza.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/nidozutixiwoki.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/nusabekavagekanefonezulot.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/de2fffa61c06e09b7b5a5dc38aa29ce3/33626927944.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4057306d049343a433aea8ff3cf86896/64439492751.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609304e305ecf---kegigajuvavarubar.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/84428943415.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/5tjqfekgeeualghn6bkpb0n2qi/javenapudulizinutoro.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/seleravukodiporibaxi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bd8e74b5e---pupukugofusafodotudepib.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/gigiza.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/d09bd580c4d635f090ed19d508bfcb3c/pidusukebawapejojuzavuz.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_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 17068 bytes
SHA-256: 6fdf429f29f9491b9c1321695fb55d5387e52032ae9bc4f110c1aaf535ab3604
font_01_sfnt_off0001217d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217D 10620 bytes
SHA-256: c11394899054c2c80ebd37b7c55a567f413700a20e36a5c742af8a461933c41a
font_02_sfnt_off000139bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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