Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd659954e03d44c3…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 07:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9207b6f8ef330c60fc4226abb65babe9 SHA-1: 7829e09c8a42d9cc0befa96aec94976c3c0348bf SHA-256: dd659954e03d44c343072ccbdc702decf49c98b30f57ec9b80155feae281fa9f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, likely to distribute malware or phish for credentials. The primary malicious URL identified is https://dugedepap.ru/award?keyword=afficheur+7+segments+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 4

  • 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://dugedepap.ru/award?keyword=afficheur+7+segments+pdf PDF link annotation
    • https://cdn.sqhk.co/kiribikiv/jlhejjm/fewigijanasegowidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_60693b9be7e05.pdfIn PDF document text
    • http://vigetatefix.iblogger.org/ward_perkins_arquitectura_romana.pdfIn PDF document text
    • https://bageribo.weebly.com/uploads/1/3/4/5/134592059/sesavudasarafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_605a0c922395c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487631/normal_5fe678174b436.pdfIn PDF document text
    • https://cdn.sqhk.co/zifegowuf/pAhfigo/wolfychu_face_in_real_life.pdfIn PDF document text
    • https://kimiligemapi.weebly.com/uploads/1/3/4/3/134343210/03f1eca4ffeb17e.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/melujotikudomis-xabenoleduzojo.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/313d0fd.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/gobobuvozef-zakowo-gapunorafogaxof.pdfIn PDF document text
    • http://sorekivobu.22web.org/jetafuwad.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/7GjbK06/gobujuwikaxemenojes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_605a0651938b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fipijife/6360141980.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/lemuzogej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f744cc1-5b43-4ff9-8261-df7ec2c33acf/83169420944.pdfIn PDF document text
    • http://wefasonukot.epizy.com/kajorubebemowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88760f35-d100-4487-a976-b82a1f9103f2/92461905282.pdfIn PDF document text
    • http://fozufafetad.epizy.com/99244054738.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/comptia_a_certification_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8e4b72-d92f-4386-bb99-07b29ff0a00d/nagojeju.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/purchase_requisition_format.pdfIn PDF document text
    • http://sazexuxezife.rf.gd/47180716184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95c456d-f786-4a95-879b-f550f9bfa34a/79494446536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c33034-65a0-4bf9-9d5d-6c607827928d/is_starting_a_blog_free.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://scripts.sil.org/OFLIn 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_off0000dc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 5396 bytes
SHA-256: fc3840e55e7e85882cd6e0f7a6df51cfde01fe54e0afc6a59461825a6ca1a019
font_01_sfnt_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 12012 bytes
SHA-256: 59360daefbfcc931c7b35ff0ff3f76f29a973545fb49d5c794925567edfe1690
font_02_sfnt_off000114de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DE 16272 bytes
SHA-256: 8596d51a523124fcb1950bb0b7033b1d9054ead7d937a3136e05175fcc3fb7d3