Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5d4125bc6a76e8…

MALICIOUS

PDF

74.1 KB Created: 2021-03-24 21:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2883a98c90e08291f78c14a8eda43734 SHA-1: da23a814e996b0099367df98c124414eb5c63374 SHA-256: cc5d4125bc6a76e8105c03f94237218b8d84063e2723e95989f8bb937b437d24
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=celula+animal+partes
    • https://cdn-cms.f-static.net/uploads/4485152/normal_604669fb23018.pdf
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fc79bff2c5cb.pdf
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5ffc9911e8fc5.pdf
    • https://static.s123-cdn-static.com/uploads/4499317/normal_6000b2bf594fa.pdf
    • https://cdn-cms.f-static.net/uploads/4471692/normal_601f7446aca6b.pdf
    • http://dopelozaf.22web.org/always_on_display_apk_pro_cracked.pdf
    • http://kenanimit.iblogger.org/adverb_adjective_collocations_exercises.pdf
    • https://static.s123-cdn-static.com/uploads/4495838/normal_6002bc561ff7c.pdf
    • https://cdn-cms.f-static.net/uploads/4465018/normal_5fd627aeef819.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/26852956-c095-4248-9354-fb49da4e9a61/34218540239.pdf
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_3121b6e783974d9b893595421cd65461.pdf?index=true
    • https://s3.amazonaws.com/bokofapig/monthly_retirement_planning_worksheet_chapter_8_answers.pdf
    • https://s3.amazonaws.com/wupixufekijax/calendar_math_worksheets_grade_2.pdf
    • https://s3.amazonaws.com/gozifep/ap_reorganisation_act_2014_telugu_version.pdf
    • https://s3.amazonaws.com/tarajix/canon_sl2_manual_mode.pdf
    • https://uploads.strikinglycdn.com/files/5057f8b4-f1ae-4f82-bc7e-e40f63a720f1/zufufobebakobaruxex.pdf
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_a8bd79166ff740218a950a3640432ee0.pdf?index=true
    • http://mijuguxugatuk.epizy.com/a3_problem_solving_applying_lean_thinking.pdf
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_2d8326c3e1d9476c80ee2075d92dd2c9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a4.bin
cc98a3e762e8f0946793fe0f8babadf9a6e3db56261a684d14132e471417b134
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 4868 bytes
font_01_sfnt_off0000f613.bin
7fa1a0cb161a77c6e7f6138677c3d0b7692ffff2ef9c632685b1a515f06f5811
pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 11128 bytes