Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85051252018da77…

MALICIOUS

PDF

70.3 KB Created: 2021-03-18 13:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ab9fe8512dd0983db075240e49f3a633 SHA-1: 1995ec5b2e811f50ed6238bb17eee3c53d501866 SHA-256: b85051252018da77025350649eaf08ee3f13d70115091da4bc319c83fef545c0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic point towards a phishing lure, likely intended to download a secondary payload or redirect to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=mishimoto+7.3+transmission+cooler+install PDF link annotation
    • http://dimopun.mywebcommunity.org/zarofutosuluf.pdfIn PDF document text
    • http://br1.red/binomial_exponential_and_logarithmic_seriesysqqf.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/zugozip.pdfIn PDF document text
    • http://shoop-fm.ru/sodepobobasejubokxqut.pdfIn PDF document text
    • http://vexoxem.scienceontheweb.net/juxipawidul.pdfIn PDF document text
    • http://wedidizelajat.mypressonline.com/fobejajutifim.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/resisuna/chama_chama_new_song_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/attendance_allowance_form_ni.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/44157493658.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/custodian_resume_template.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/favanofanevijiba.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/pretty_little_liars_removed_from_netflix_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/idsa_guidelines_intra_abdominal_infections_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/tumuta.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/moparisinon.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/datamonadaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/d_d_fighter_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/19848768996.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/complex_numbers_operations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/latest_gst_tax_rates.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/15926075329.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_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 5320 bytes
SHA-256: 3f0c1451ecd541d77fdae5479414575b0ba30e8d62aa5cfb7cf96e8d4eedfc93
font_01_sfnt_off0000e4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A4 10968 bytes
SHA-256: e8841d293a3d83ed0a4c4b73780c649fa2756446341c3037b581cbba4671589c

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