Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5961284c8a6f3e…

MALICIOUS

PDF

71.4 KB Created: 2021-03-04 19:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d409c23d339bf78aaf3980a39b50065c SHA-1: 85e11f6ac2af6eed462f8ce172517b1432787dca SHA-256: ec5961284c8a6f3e93c840c5933088c463d8d10c8166227c529ff6445bb895b0
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=how+to+edit+text+in+pdf+using+paint In PDF document text
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/8731902.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/1243593.pdfIn PDF document text
    • http://xusatijugezi.iblogger.org/harman_accentra_52i_tc_price.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/lugexexexen.pdfIn PDF document text
    • https://xekanowodupap.weebly.com/uploads/1/3/0/7/130739303/5db110ff1f10ac.pdfIn PDF document text
    • https://sapuzexa.weebly.com/uploads/1/3/5/3/135348006/kedasuvun-nupobifawijo-vezisusumaziju.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://uploads.strikinglycdn.com/files/da627057-abd1-4071-9c6d-7173317d4cb4/25640688728.pdfIn PDF document text
    • http://labutebumir.rf.gd/doxuloxuweg.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/fast_breeder_test_reactor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f021151-a433-4046-b04b-9516242fb739/how_to_calculate_tenure_in_excel_in_years.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10b726e-45ad-46d2-b915-e1e162523f13/43028851448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1016042-4ee5-4f0d-b303-538be890703c/what_can_you_eat_on_purium_cleanse.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/call_me_by_your_name_movie_sequel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f59954-18d2-4397-93fe-02755adbceb1/manual_software_testing_tools_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/duxupajipewofef.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_off0000cf38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF38 5084 bytes
SHA-256: 2240ccdf0ab093c59568cfb40dae73cb424d658bf391ddaf764035d2e1462ab6
font_01_sfnt_off0000e0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 9868 bytes
SHA-256: 381254ca979e597fd1b9bc86e60c2a4a27d9e01f3af605d96217dafb2bc9fe29
font_02_sfnt_off00010292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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