Malicious PDF — malware analysis report

Static analysis result for SHA-256 3237cb4dbf2b6b79…

MALICIOUS

PDF

82.5 KB Created: 2021-08-27 01:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b2dda98cf09d98af12e879908f7a1238 SHA-1: fba032c025ab9488ad77ab937fbffb4bdf938a94 SHA-256: 3237cb4dbf2b6b79986ab4679da3c5401fe25d2521bbd84b08bf30a3f0fa84ee
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and other potentially malicious hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the link farm structure is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/983a1caf0598cdfce004088928485a87/63993894942.pdf In PDF document text
    • http://thefarmatarapahoecounty.com/userimages/satifukuwibok.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/51524400865.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/8f4ecdf62df1ec8b24619b99725932ee/puvoketeviwawur.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/75599916554.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/1848647548.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7ad8f4d2a3dbf5338b8f021dbd986a9a/94590417137.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/gevojusiwotofojudobilisod.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607740c091085---kibozixetagalenaminupulam.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/joxidapogivojotu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12c17cf42d---revarisasewesinewo.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fda47e74c---28586748063.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bddd01c033---wizixikiravonaxeb.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/72206871803.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/faxibiramowuwurokub.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/sujopepadorafapitasabaxu.pdfIn PDF document text
    • http://ktcz.eu/files/files/paratufigidilunizunekisi.pdfIn PDF document text
    • http://championsview.net/userimages/batimorolat.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/tozireb.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/paxexagazazar.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/41239834600.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612169de05aa7---xupozukolobuxinesiro.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/vetijekezog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=let+it+be+peter+jacksonPDF link annotation
    • 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_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 10640 bytes
SHA-256: 1de6c25f927df7b6dfe608ba5ab676e26caacaace1ef4f4c5051659fcd7101ee
font_01_sfnt_off0000f710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 17484 bytes
SHA-256: 976aa0f6c9dc2e116efdd43282adaa8bc56994d3ebb6844c4fa1f320ce19fce7
font_02_sfnt_off0001238d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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