Malicious PDF — malware analysis report

Static analysis result for SHA-256 c724dbfe75f59204…

MALICIOUS

PDF

67.7 KB Created: 2020-11-11 02:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1ead45d5e5199105479cd7239d04b7f0 SHA-1: ec7bc7558be59990517e8581451bd0fdfdab8626 SHA-256: c724dbfe75f5920424b7a4272563e17665d7ee7e497185396548d2e59f62401b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a clear intent to direct users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/aws?keyword=whirlpool+quiet+partner+iii+service+manual In PDF document text
    • https://didizotaxudip.weebly.com/uploads/1/3/4/6/134619455/sosef.pdfIn PDF document text
    • https://bisawovetazevel.weebly.com/uploads/1/3/4/6/134613631/6380339.pdfIn PDF document text
    • https://jaxazinozusepir.weebly.com/uploads/1/3/4/2/134235406/6058468.pdfIn PDF document text
    • https://lenimupet.weebly.com/uploads/1/3/4/0/134013040/pezap_duwopoki_gavatade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f8c631b96d5b.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/wewuxuviwar/bcs_study_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0567e36-d897-49f3-9e07-4e55b97c1279/69118493239.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/95072434138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4bc1d9-322d-4cb9-afc0-4b2ac21430fe/joy_division_discography_rar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4945f8ac-993b-448b-8876-bc038c4287e0/20652780087.pdfIn PDF document text
    • https://s3.amazonaws.com/wixikarago/dokesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b67eff-6e76-4643-b456-ab8de5c41df6/nogadazexixizufekedev.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_off0000bd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3D 5252 bytes
SHA-256: 273393b72f5503f42a0aba86c18595441c27b11e6a9f4efb21a33b0b5aabd56e
font_01_sfnt_off0000cefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFA 10912 bytes
SHA-256: 47f2d7cc0b19aace3267c6f1963895ca9608a9338e3934e7e0d54aa8d446e872
font_02_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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