Malicious PDF — malware analysis report

Static analysis result for SHA-256 def2d4fa0b0018e2…

MALICIOUS

PDF

69.3 KB Created: 2021-02-13 08:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 74845de83f07cf4dd612346dd56a0265 SHA-1: 99091a41b173fad8ce8cbab7e80f838ab17e28d2 SHA-256: def2d4fa0b0018e29e76cea43687e4746cec982084785d525b994b8b5637c101
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://yafferge.ru/wix?keyword=netgear+nighthawk+r7000+firmware+update+failed In PDF document text
    • https://cdn.sqhk.co/gasawivu/Y2q9xie/swiftscan_document_scanners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_6010e42f06024.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422627/normal_5ff5e22938224.pdfIn PDF document text
    • http://datingsexchat.site/55892330649g4fc8.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/phbMgjf/fisher_price_dino_racer_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_6026b0ecd1616.pdfIn PDF document text
    • https://wemovimezatura.weebly.com/uploads/1/3/4/6/134611727/zidegadad.pdfIn PDF document text
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/museritexuv-pobagado.pdfIn PDF document text
    • http://edayafar.xyz/bleach_vs_naruto_apk_androido6hg0.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/xamekid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5fdf7e7d93f74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5fcee0633817b.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/38ab1b3.pdfIn PDF document text
    • https://devivevapidon.weebly.com/uploads/1/3/4/7/134711806/788726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12A 5624 bytes
SHA-256: af865b3ebf258c9d893c23e920ecd3ba664111ce207d37331ab2f5f74e459358
font_01_sfnt_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 10576 bytes
SHA-256: 8339a529fe504f12572a59fab66e914ab3a279e0b062e6c160ab5ec37e2fd6fc

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