Malicious PDF — malware analysis report

Static analysis result for SHA-256 194d11272f7e0d34…

MALICIOUS

PDF

84.6 KB Created: 2021-03-16 22:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 022b763a662b99e16bfe2f839240f8e3 SHA-1: 02d085b47cf43e3966b18aed3da96c6f66410728 SHA-256: 194d11272f7e0d34dc1bb089e618b583b97fa536b80d0772a97116e3700c966f
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with phishing campaigns that aim to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=format+code+in+pl+sql+developer PDF link annotation
    • http://wirelessinfo.ru/original_american_cookery_book860tt.pdfIn PDF document text
    • http://opticsystem.website/1320783599uzhzu.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/iEjijEH/83824966521.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/9eghqhi/usac_twitter_ucla.pdfIn PDF document text
    • https://cdn.sqhk.co/guwodirulik/cihPhjI/gegixijosesipenupuzo.pdfIn PDF document text
    • http://sportplays.ru/rockschool_drum_booksr47h9.pdfIn PDF document text
    • https://cdn.sqhk.co/fotutubujuf/haiehjT/ninja_blender_cups_australia.pdfIn PDF document text
    • http://rankingcoach-apps.com/59522342003hhqwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_6033847053b10.pdfIn PDF document text
    • http://ru-payment.casa/nancy_friday_my_mother_myselfqjz3w.pdfIn PDF document text
    • http://arevakar-travel.com/vocab_workshop_level_c_unit_2_synonyms_and_antonymsofbx6.pdfIn PDF document text
    • http://proita.space/wovibuzomabauxq1z.pdfIn PDF document text
    • http://help-service-support.com/perekaruzofpt8jb.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/iirAsjd/national_championship_college_football_playoffs_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503525/normal_5ffb8334e47ed.pdfIn PDF document text
    • http://youralteragoods.com/refelude918j6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/75657ce9-b144-42f1-a25c-4dd57d651f63/werodeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67caf8a3-98fd-4ef2-9c27-a096c2cad04a/tuviwikopozap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42e97f8-b131-4851-a06c-df5f5d2efb8a/pawunobalaxiwenisemajo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 5360 bytes
SHA-256: 30ee65a65b944419ee0491efd276b183022b7e88deb524a98097e153802926fd
font_01_sfnt_off00011c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0E 11896 bytes
SHA-256: f245aef2142954c29d116a327c4bb7bfcf59319d2f7fa246ef0651f01710cfde

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