Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee86a2aa632c69c…

MALICIOUS

PDF

75.7 KB Created: 2021-03-09 02:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6e0549dc4e837f45c21dc0df1c523e6d SHA-1: 1dd796b0f8bd4f4a925a8cb53b65d4d4c64b5ec4 SHA-256: 1ee86a2aa632c69ccdd5b6289b87c47118f34392c3e8c07d1dbbf35169731b98
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/award?keyword=pengertian+akuntansi+manajemen+pdf In PDF document text
    • http://checkmyscore.info/sinedakofaladasefetegumy8j6.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/82290891926vejuq.pdfIn PDF document text
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/c6c38292a10d.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/1723273.pdfIn PDF document text
    • https://felabare.weebly.com/uploads/1/3/0/7/130776415/58a30f.pdfIn PDF document text
    • http://puduvab.sportsontheweb.net/keith_code_a_twist_of_the_wrist.pdfIn PDF document text
    • http://gnoogle.site/princess_bride_free_full_movie0k5r5.pdfIn PDF document text
    • http://nikaold.site/risasejozogonoxujj5ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/stories_to_read_to_7_year_olds.pdfIn PDF document text
    • http://mawokale.myartsonline.com/58268300785.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/reciprocal_teaching_strategies_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f9c6e0-67b1-47b2-a266-6e1866831f55/judumaxikolewufonuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e2f273-bfb2-4f06-9732-587ecd2ecba2/54237657305.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/93312439239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4e3082-f9b4-450b-8035-b8872366f500/yamaha_motif_xf8_61.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/google_dictionary_english_to_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/application_essay_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708ac16a-17a8-4ec9-9ca4-44d4805e6d86/xerox_workcentre_7845_driver_mac_os_x.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/27590427614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35f3ec8-d303-4442-a9b5-f78301222f5b/2018_scott_scale_710_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084f9895-0edb-4e1e-bcd1-987e35c8e985/6.0_powerstroke_injectors_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be115e1-5572-485f-b0dd-753c12be4f1e/calendario_mexico_2020_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e875a7-0f3e-4f46-9c76-ed0aa7742866/51505772209.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/20512942523.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_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 5472 bytes
SHA-256: 92e5017e9fa207381fe2e7c80992d89948e14cb2af0b5bb358a10a226505657e
font_01_sfnt_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 10104 bytes
SHA-256: 20c833c348152656bf013aa91f1850a78afc62d2cef49625d532e1abead50b44