Malicious PDF — malware analysis report

Static analysis result for SHA-256 edac205d192cd00e…

MALICIOUS

PDF

75.1 KB Created: 2021-09-24 22:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 71b6ae6ea3adfb95c240abfe63c30776 SHA-1: e4fc6ff9bc7241fc1f483157536d5d261f65a19b SHA-256: edac205d192cd00e1b8e8de70261bd3a5a5288a378aa9d17325e95dfca6b9137
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is structured as a link farm, with many links pointing to compromised WordPress upload storage and disposable hosting. The primary goal appears to be directing users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://catamma.ru/uplcv?utm_term=album+art+grabber+app PDF link annotation
    • http://tareeapartment.com/user_img/files/90405466929.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/jajalidifikixu.pdfIn PDF document text
    • https://doitoutdoorz.com/file/JPgXEOhCaOu9z3zj.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135161a06366---8509657598.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ea269ee41.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a2b3a881d38b6e1f9812109aac763f24/10479937886.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///suger.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161457ea1728fd---22267547352.pdfIn PDF document text
    • https://tessuno.com/upload/files/61485d3b73f7e.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/59657659714.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/jugunosojudilakiligepi.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba89d1c0b3---3969340192.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109031829002496.pdfIn PDF document text
    • http://blueyee.com/upload/file/21072243135.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/e3e9ca4548e4461e8fc2a6399cec4143/45554055214.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/bupomi.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/10023764731.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/61306420679.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614242cb44dda---dibizunili.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/xatov.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/pf4k0oso7nqlrrqjqm1v3nh3ll/42838017857.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/kulavabupola.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/xotakogigejo.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/pabazaxopegenugigidire.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/12345049189.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_off0000be8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A0 19040 bytes
SHA-256: ad08cd48192864fa4e1bdd9fdc5c6c49e8d0b3d0814a5f6a0c9eec809c41dcd7
font_02_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 10332 bytes
SHA-256: d4b1257d6e8671295319cce43b5fa21a128bbdbafb4a96edb11eee175e84d5fa