Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c598d210f19e04c…

MALICIOUS

PDF

65.5 KB Created: 2020-11-27 06:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5603a818bfcd76ab12a9c0f5105c27ac SHA-1: 8dff6ec5a7aee751d92c6025a02cd7447079f4a7 SHA-256: 6c598d210f19e04c4ee2466962c400c25a77de0d707a7349f37f9f0d22e6b7d3
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL point towards a social engineering attack designed to trick users into visiting a harmful 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://gettraff.ru/123?utm_term=asset+entry+worksheet+economic+stimulus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8dc708ebcfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f9ad1541a0a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f8a52d28a576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fc017cd923e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/sony_handycam_dcr-sr68_pmb_software_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/biosense_webster_product_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/besale.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/cute_baby_couple_pics_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376466b0-f70e-418f-9fa3-6fcb68be2dca/everfi_credit_scores_answers_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bf2729-ee90-46aa-948d-76d11e8c7240/vizexenipojanazifoxiwox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18877319-d78c-4102-a041-a9a589f1ea95/zijofageminevufasumax.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4ED 5076 bytes
SHA-256: abb1720b813671917950a98eab79c296b659ef30ec11f92cea9c939da857ea55
font_01_sfnt_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 10416 bytes
SHA-256: 82d28094d14da93e3bc239c3432fcc3741373f2003202bac03ad16ee1778d1a3