Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b53a66249737a33…

MALICIOUS

PDF

66.9 KB Created: 2021-10-01 11:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2f1bae452d4966eab4bd21e3200a422d SHA-1: ce085d547ab201f64352f7129bfd09f127399a6e SHA-256: 2b53a66249737a33bce35796704882bfaff23b8c36b2c5081ea4628e31a7dca7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is part of a link farm designed to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://bloomx.com/sites/all/sites/bloomx.com/files/safoxikafadeladisomis.pdf In PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/zevabamezijewudat.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614209c078768---96075495646.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/cd5fd244120073c9e4e5a97e994e6992/gupatavuditoxap.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/dejonukos.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109040546154762.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a2690005---maxowexowesejiletofurem.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/tepuj.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/12817033785.pdfIn PDF document text
    • http://ledins.lv/cms/file/29080245072.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/sasiboxep.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/48561537832.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210929125041.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-3/20210903010916102596.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/wivufuduvurasilomasaziw.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db21950a69---91914535961.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/63350854031.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/44581033564.pdfIn PDF document text
    • http://yonetim.e-cari.com/upload/files/3663770597.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/sulejakevu.pdfIn PDF document text
    • http://matras-devison.com/upload/file/ketoloxafov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ets2+mod+apk+downloadPDF 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_off0000ab6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC386 10508 bytes
SHA-256: 4f407594b9ea4e0c8b3c3f455268de80ab72e2ea75154b1b999c106cad8c6255
font_02_sfnt_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 14224 bytes
SHA-256: 7aeafb670565b5ea98064a74dd87425b73bd564931cc74bae6299fc435f50655