Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c36b0263603730…

MALICIOUS

PDF

90.6 KB Created: 2021-02-22 22:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d6d0f7e86c278453007f80f584992520 SHA-1: cadf0057d81b38d63090b0a8eca8f59e00a009fd SHA-256: a9c36b02636037302a8aa93b257af5f62a826e0225f07144dbdfeead7fe865fb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=samsung+washer+not+spinning+or+draining PDF link annotation
    • http://demask.fun/bevurvacir.pdfIn PDF document text
    • http://goossyy.online/46244856376xg0vp.pdfIn PDF document text
    • http://idealica-ituficiale.website/keith_haring_la_danse_multicoloregmpbe.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/dbo0EZw/coupons_for_wish_august_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_60108d32b4148.pdfIn PDF document text
    • http://ro-shop.space/96363054814ncuoy.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/igOhjqe/heart_problems_after_covid_athletes.pdfIn PDF document text
    • http://formblckr1.xyz/16270689836zc66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402261/normal_600397983fad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_602bf60c34bc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_6019f42f970a3.pdfIn PDF document text
    • http://winoorama.space/atmel_studio_7_libraryo6zxn.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/d91o4pB/matlab_program_bandpass_filter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xozeb/manijulaxovoxazom.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/58241154912.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/binomial_distribution_table_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/22344920084.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/82364794649.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 5420 bytes
SHA-256: 7b99964fd1e1be619a789d4f0f23c4f664ed2165aaa17f59431f902b31e76349
font_01_sfnt_off00010d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4B 11992 bytes
SHA-256: e65c8a0d0a61c4a30acc9a4eaa37d5444b04850079f3103e5fcaea6ce14001b3
font_02_sfnt_off0001365c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365C 17044 bytes
SHA-256: 8c2f7fa45bd7a7cb00436c2187ca4f892f996c70dac46e9180ed74fa252df1e2
font_03_sfnt_off00014eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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