Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bcf25961278e84…

MALICIOUS

PDF

71.5 KB Created: 2021-02-25 13:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b7efcfc01e237976b4743c30fd71d032 SHA-1: edce4a10c79744b10d7f436182845de52d2180f8 SHA-256: 61bcf25961278e845e66f5c642c3abb05033158f0ebfab65470e5f0bf27ac61d
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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+pass+frm+part+1 In PDF document text
    • https://powujuraw.weebly.com/uploads/1/3/5/3/135321569/04e439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_601cff939006e.pdfIn PDF document text
    • https://jogosoti.weebly.com/uploads/1/3/1/4/131453036/monixejevuvijutu.pdfIn PDF document text
    • https://vofitusu.weebly.com/uploads/1/3/5/3/135301199/mezivamug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5fe84d3d44c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601cd8743be13.pdfIn PDF document text
    • https://cdn.sqhk.co/gimiraxu/EOjhii7/15358333902.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/GaEajgm/tiki_kart_3d_apkpure.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/senamegat.pdfIn PDF document text
    • https://cdn.sqhk.co/givinonu/F26Zqhf/standoff_2_download_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/hgUifhe/44201009192.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/kukupunopedon/lilafajizasejinesokomapuf.pdfIn PDF document text
    • http://jojisoxig.epizy.com/tukoxu.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_off0000daf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF5 5120 bytes
SHA-256: d280306c177b69b5b2c06ce11bc8f9a10821e686318d4c3d0dd52ead437c715e
font_01_sfnt_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 10900 bytes
SHA-256: 4dbe46447509e9d6fe9741019bc264722e3d2ef43ece1d2a948d6a11b9710cd5