Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb98129bcef8df1…

MALICIOUS

PDF

87.4 KB Created: 2020-11-18 02:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d5eddd43b7050e38ba12e18cfbcca863 SHA-1: 95fd9b13264786fdf6956fc3f78d109e5ca07684 SHA-256: 0eb98129bcef8df1bd5cc99f53e9481321f7d2f86d1d73522cabc03e902b0c5a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/123?utm_term=mapa+de+pr+con+pueblos PDF link annotation
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/bigusak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fadd933a5bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fb29a4545089.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/dapekufoxiraku/bxmx_fund_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d95f14e-0f10-464d-af62-752528247f22/nazupufitebegobaxipap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1444a574-2d00-4028-9da2-ebe973ac53be/arrival_of_marie_de_medici_peter_paul_rubens.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/kawexapiraxubijisobowe.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/tupperware_measuring_cups_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d35398f-028a-44f5-a6bf-cc2a43c13d50/mulere.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/child_protection_reporting_line_victoria.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/woneduxakubavef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea30319-634a-472a-8ac9-616c2bd5b2fb/72435209187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c2725c-892b-4680-8acf-4cef3284aba0/avenged_sevenfold_unholy_confessions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93fc2143-14fd-4ce8-bfb0-cddc59c698fb/bemojowuniduwisad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36823f40-1c24-4a55-9d00-b31c03973f8d/71559709366.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 4964 bytes
SHA-256: d12b9a9e9e5c8f9ed496517b9343b2297bb98cdebd84881b46b6ef7f40fc311c
font_01_sfnt_off00011ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 11588 bytes
SHA-256: 2790721ee8c0a0fad60fb7a6d13144e16e24d7ffe93b3ce0d5c3610f717a2df3
font_02_sfnt_off000140da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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