Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba37abc6a6289af…

MALICIOUS

PDF

77.1 KB Created: 2021-04-25 06:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 94f10d33a238f81a6dec982babbbb934 SHA-1: 16310c8fe32f4308fd056baf10e73bb388257d4b SHA-256: 3ba37abc6a6289af7969e8969f506da3eaff3624e13284cb19155ee76f1794cb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=que+es+un+ensayo+descriptivo+ejemplos PDF link annotation
    • http://wofaguwere.iblogger.org/borderlands_2_salvador_solo_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/q4Mje5B/98396405877.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/cBgiheL/is_prime_music_free_with_prime_video.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/lggG4he/mevuwewagujosit.pdfIn PDF document text
    • http://sofofal.iblogger.org/40983362722.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/toniseligiwuzux/rinexotazagigime.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/nopakunerinatat.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/novujilawe.pdfIn PDF document text
    • http://kofeninoxilerif.epizy.com/different_cerebral_palsy_types.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/fiveboxez.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/leominster_restaurants_guide.pdfIn PDF document text
    • http://vevemaj.rf.gd/todibulodotidinob.pdfIn PDF document text
    • http://kobizesamow.rf.gd/ms_window_grill_design_catalogue.pdfIn PDF document text
    • http://rubidolad.epizy.com/google_sheets_templates.pdfIn PDF document text
    • http://toramowajo.epizy.com/hssc_admit_card_link_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/lagazulawoladuk.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/79685870306.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/limosezagi.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/stacked_bar_chart_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/international_business_management_books_free.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/avengers_assemble_ost.pdfIn PDF document text
    • http://bireses.rf.gd/29289316685.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/critical_ops_android_review.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_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 5516 bytes
SHA-256: b89bb703ffeb493b5b53be44c7bc800fbc8239815551846a225c453c8b7ce005
font_01_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 11908 bytes
SHA-256: 4ae9886e1d8f821ee24453e12293d288235156c00e587f8d35e05d0d20666216

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