Malicious PDF — malware analysis report

Static analysis result for SHA-256 a270863a2de9e74b…

MALICIOUS

PDF

68.6 KB Created: 2021-02-18 22:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6c5383c3e4c521d6cc30031c2a06dddb SHA-1: 1de3fe42b40a1f43da1cc36300ba7de0879f745c SHA-256: a270863a2de9e74b4657597e9691f91d1b03645dd159a609fbc61ea4531119bc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page. The document body, though heavily obfuscated, suggests a lure related to educational materials, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=climate+graphs+worksheet+answers PDF link annotation
    • http://reactivaperu-viabcpi.com/912002147583cq5s.pdfIn PDF document text
    • http://lifeit.pro/89676515108ols3y.pdfIn PDF document text
    • http://dexujin.iblogger.org/light_bowgun_guide_mhw.pdfIn PDF document text
    • http://nonretloli.site/etfe_front_sheetgn5ya.pdfIn PDF document text
    • http://reduslimitalia-official.site/92818946017id4xm.pdfIn PDF document text
    • http://zezomaxijuduj.22web.org/kodofulurumexub.pdfIn PDF document text
    • http://pihodze.com/hebbal_bus_platform_number_in_majestic78a3d.pdfIn PDF document text
    • http://ideaita.fun/radical_hope_jonathan_leary6sje.pdfIn PDF document text
    • http://shoop-fp.ru/herencia_post_mendeliana_mapa_concepwqiac.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/nonabafat/equivalent_ratios_answers.pdfIn PDF document text
    • http://ketoxuxun.epizy.com/alternate_day_fasting_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/prime_factorisation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/kamau_brathwaite_the_arrivants.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/18870740805.pdfIn PDF document text
    • http://wazozugafen.epizy.com/aqa_gcse_physics_student_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/jasixerixegulojudusa.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/wow_affliction_warlock_guide_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/14132855899.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/speak_now_2_workbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/22965130272.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_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 5292 bytes
SHA-256: 165c07e2752bc1b42292b2f08ba5c84ecdd7a550f4eb24b41b7c1a3eae993c99
font_01_sfnt_off0000e27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27F 10212 bytes
SHA-256: b8215537367ddd50f1b1887a88f11847b1549a79baf8809ab99569d83df9774c

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