Malicious PDF — malware analysis report

Static analysis result for SHA-256 595e5ba595cd2484…

MALICIOUS

PDF

76.5 KB Created: 2021-09-03 03:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 14dcfd9f26912d3b5fdc41fc527c75cd SHA-1: 0085d83b9b82a9b71243a9a4ce1d468217e0275f SHA-256: 595e5ba595cd24841b2b287f13fc8c2b3726ab2b9d369b45af3d74c7c2a06f54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm nature are indicative of an attempt to lure users to malicious sites, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4be981cc14---54518371719.pdf In PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/jabere.pdfIn PDF document text
    • http://technocom.pl/editor/file/vifupinufigifewapeno.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/8099925184.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/75197464218.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6c4bb796320b0a6d1677917456eb2af6/titoximakegaze.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/31785980564.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/81829976798.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ea2210b55---jagoropazevule.pdfIn PDF document text
    • http://koala-al.com/d/files/tegaf.pdfIn PDF document text
    • https://isleo.com/i_photos/file/lixotugo.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16219357697227.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/99033918844.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/fusuzira.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/82319384023.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/wagemibubitowapolazi.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/27934797072.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/86781814410.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/biregipavokefemusewom.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/8t0iejuaj16oc7fma7ca3cd6r2/vuwozi.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/1369d0c6fdf8bd21d8e68b065c91aea5/25979052626.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/fasovufatuwugowum.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/57998868826.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/56645503064.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da57a89477---44195972134.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/0c8c8d203998a01a4347dbcc30269bec/remalojivulax.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609da49392730---56483905576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=inogen+one+g5+manualPDF 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_off0000c7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B7 10180 bytes
SHA-256: 0216b16f487c373203922d9c08be43e9aa9a2bd59567636ee83eb8bb3ea7200f
font_01_sfnt_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 18144 bytes
SHA-256: 56b45a46745460ebf1abcfd04f2d776dca16b91e3fbbb1f57cf6ed817b16efbc

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