Malicious PDF — malware analysis report

Static analysis result for SHA-256 eace48ba98e3e2ca…

MALICIOUS

PDF

76.5 KB Created: 2021-07-06 20:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 937407ef450ba43128dbda8b973a8933 SHA-1: 1aed257c128c6e43dd6e6319fca9015372f91ecf SHA-256: eace48ba98e3e2ca2a3b883c475a6dd40d520c936351eeb19711fc0eee0651fd
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a6149fb0141---ligiden.pdf In PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ea7c480d34cdd63d65b3add801ab9348/vanizupedifalobu.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/wusupatopasadu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e49f1a150---vulafam.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/tajuwubisa.pdfIn PDF document text
    • http://watch62.ru/files/files/9221196744.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/54fnnljfmuds8v2511e5a8f0p1/2099029505.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851c249adb9---51218367209.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/kj08830je6sak84b69hs3pbtu4/xazojatanebaza.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/7p8kguif75e4sk5fjhsqo3u3p2/34400347158.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b40f4747152---95742979902.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/qkn4q586ljao59ovdg3qc8540e/duwix.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0afecf396---retujolilusoxivaritenamib.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d52b7cd9ef---dowapaxosororoxizek.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hu2ohg0c76dflu69kv9s4stc5o/6288972573.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076abc6dd287---nixibomudinafeka.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/23905445ac15237473a5cf0ea82528d0/65000162524.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/0b9d04e040fa88a34ad132fc8cbdf9b8/26653258848.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/31635919376.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9bc5acd9a8c5f834f71a7510b0dec249/kabetakizodororozumu.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/61337954736.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4c6bf2364---temadeworowirowafenarixon.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/50136128553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=confessions+of+the+paparazziPDF 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_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 16592 bytes
SHA-256: dbbeaaef66c36eb45e5c969ad81256ad64d77d9f39039fcb52a272ef2129a94f
font_01_sfnt_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 10500 bytes
SHA-256: 3987f64b66b432f92f5072010d4a2966c0ad63d4810ba8c6e7dd681d554f8fe0
font_02_sfnt_off00010b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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