Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e384a3e71ad673…

MALICIOUS

PDF

71.2 KB Created: 2021-04-28 07:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f12b5aef99f7cb80562ac63b1dd2e56 SHA-1: 7fe8f376ece6504d8ac587d718b86e3f38c81bb3 SHA-256: d5e384a3e71ad673dc90a306979e0bfc9117a6ae61aea863eb67ea1ca7bfdf80
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL 'https://zajinet.ru/strik?utm_term=brother+mfc+7360n+drum+error' suggests a phishing lure related to printer errors. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

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://zajinet.ru/strik?utm_term=brother+mfc+7360n+drum+error
    • http://nemeloru.66ghz.com/word_formation_processes_worksheets.pdf
    • http://kovafuwir.getenjoyment.net/medical_microbiology_download.pdf
    • https://cdn.sqhk.co/wazilisiko/ibhchb5/45150700055.pdf
    • http://sun-italy.space/ponasz1bfi.pdf
    • https://cdn.sqhk.co/kogoruzojif/ehhhjjg/canadian_coin_counting_piggy_bank.pdf
    • http://imedo.ru/cazadores_de_sombras_ciudad_de_hueso_libro_reseauwpqf.pdf
    • http://gatorama.fun/takufarx96vm.pdf
    • https://cdn.sqhk.co/duwenaxiseve/angg4he/79863817227.pdf
    • http://beliyden.xyz/34731064916j9ljb.pdf
    • http://sellamorem.com/423683300405h3a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sepovutapakogaf/31652649353.pdf
    • https://s3.amazonaws.com/wetevali/35849417357.pdf
    • https://s3.amazonaws.com/gezizefefififa/ribago.pdf
    • http://wekidezeze.epizy.com/laxixiferu.pdf
    • http://divejekojo.epizy.com/12595349159.pdf
    • http://zezofakarol.myartsonline.com/21539703827.pdf
    • https://s3.amazonaws.com/gazijewevan/ccna2_chapter_1_exam_answers_2018.pdf
    • 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_off0000d720.bin
41d5392a9af82c3fc82de6187d617a1723992eaffc3c52ade7cd31c9afdafc34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD720 5432 bytes
font_01_sfnt_off0000e980.bin
e3a4ebb12520008c5511f96b0d38d9f6bc2d068f036c67e243c91c51a36baf70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 10952 bytes

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