Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c6bccb1479988a…

MALICIOUS

PDF

79.6 KB Created: 2021-03-08 19:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b1f431ea15673f95305565f335a6ff44 SHA-1: e85610a95fbe94e87b1f115ee00de3243ec201ec SHA-256: 03c6bccb1479988ae2c4fa8b549d0b332fca483dc1683280c3b774bfb8783fbd
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to lead the user to a malicious site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/123?utm_term=confusion+matrix+report In PDF document text
    • http://znatural.space/friendly_tv_app_reviewsgl2hh.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/b8re3hd/gupadevububok.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/jbBhcha/wolf_mate_x_reader_lemon.pdfIn PDF document text
    • http://italiabeach.space/vosategursss.pdfIn PDF document text
    • http://cheeronthemove.store/shakespeare_sonnet_12_sparknotes1dchp.pdfIn PDF document text
    • http://workbykoder.xyz/aparato_locomotor_para_niosjqm53.pdfIn PDF document text
    • http://fullhp.info/how_to_outline_3_paragraph_essayv4m1s.pdfIn PDF document text
    • http://vas-rem.ru/ridgid_air_compressor_manualqefel.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/bGgga1A/timagomega.pdfIn PDF document text
    • http://portkamesto.site/aberdare_mv_cables1k1km.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c08d6c-e1e4-4456-ab27-fc601b03d029/best_blendtec_jar_for_flour.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/37987095251.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/81853571093.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/biogeochemical_processes.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/excel_macro_enabled_worksheet_not_opening.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_d2c22d8a7ff842bcb277184e201142fd.pdf?index=trueIn PDF document text
    • https://e7c716eb-dbe2-47e6-ba66-22a9c09b3d16.filesusr.com/ugd/a58502_8d59778dcee34921a9716b08a30b53a9.pdf?index=trueIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_e8c5a68f5d034229a8145b5f46907cdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefejevife/chernobyl_2019_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4978f5-1dbf-4595-9b7a-39a33299cd30/73211857423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 4988 bytes
SHA-256: 449d414855afb1ff0e55feeba135bb5253ac2ca2e8908995c7bd566752b3c93a
font_01_sfnt_off0000f396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 12116 bytes
SHA-256: 7984417a2de7706a5de6b3b1e6850ff019007ebbabefdd48e0c0c0b005f401e5
font_02_sfnt_off00011c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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