Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebde04c1cdd94ff…

MALICIOUS

PDF

78.0 KB Created: 2021-05-07 06:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3781e5ffa084193bc76988ad0b4bd6ff SHA-1: 503540703500d16698268bcaf9ea34ed7c5fc8aa SHA-256: 7ebde04c1cdd94ff8d6800a74577e2daa2e146c8be8c15cedbb0503f5f119c61
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=venta+de+bombas+de+ariete+en+puebla PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475000/normal_5fff30c766aed.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/gumewilanelasizikezi.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/2283885950.pdfIn PDF document text
    • http://mewanomape.iblogger.org/7154800392.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/85162503360.pdfIn PDF document text
    • http://zesawazebafipe.iblogger.org/bozatibilunuwonepawas.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/monster_hunter_2020_movie_free_online.pdfIn PDF document text
    • http://kerorukaduwewit.iblogger.org/anouilh_medea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_6047ab755f1f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_5ff5bebb016db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5ff75a6f3dcf6.pdfIn PDF document text
    • http://satomupudogoni.22web.org/normal_tension_glaucoma_nice_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvepajimape.epizy.com/differential_calculus_reviewer_by_asin.pdfIn PDF document text
    • http://suvumudupese.epizy.com/52929027445.pdfIn PDF document text
    • http://povasapodojika.epizy.com/vikowiwidavariluf.pdfIn PDF document text
    • http://zazozipuse.rf.gd/baxigerumaxitulenojas.pdfIn PDF document text
    • http://mutidulofof.epizy.com/non_chronological_reports_year_3_ancient_egypt.pdfIn PDF document text
    • http://tifureboriva.epizy.com/55222968480.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/platform_picture_ajay_devgan_full_hd.pdfIn PDF document text
    • http://sumafalonedap.rf.gd/18635810402.pdfIn PDF document text
    • http://bovubodomumid.epizy.com/zenati.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 5212 bytes
SHA-256: 0914124e5e11f415dc7f840a4e6417e43510f9e6ed931ac8922748a6eef04353
font_02_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 12292 bytes
SHA-256: 85d41424778ade1713946532fc19c1046f4c92c29c310fe6d92cfc4e97b1f016

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