Malicious PDF — malware analysis report

Static analysis result for SHA-256 2121502e0e2cd572…

MALICIOUS

PDF

71.9 KB Created: 2021-02-21 01:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b9253aefff2d0ab17b78ad5197bc8911 SHA-1: 0ae8c506205f42cd2a25408d26f5c271647d1e26 SHA-256: 2121502e0e2cd572ce61e92d6bd00fc3889f509a95ede2392b3969d69d139718
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=withings+ws+50+manual In PDF document text
    • https://lekevemu.weebly.com/uploads/1/3/0/7/130776436/waboxapesaveze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416927/normal_5fcb69a21d539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_5fd97b997cbe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_5fd91da7e7ebc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371787/normal_5fccbe20737ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_600b43e98a7bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_6029dc3bcf9d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5ff025e15aa90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fd79a5e166ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5ff04165cf198.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/lonifudiduvebe_rawexutatokoxi_dunoxorebusofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_602fe1ec95b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5fe89091f0513.pdfIn PDF document text
    • http://xirixakexove.iblogger.org/speed_queen_washing_machine_error_code_fl.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/9431817efad6627.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/wujapu/fujixufoz.pdfIn PDF document text
    • http://womejus.rf.gd/avengers_hd_wallpapers_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/pijifegesukoduba.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/minecraft_trial_mac.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_off0000dd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 5372 bytes
SHA-256: af07a63ec059c32cf9578cc2622878e36eb695ac8626c907744732c5c3f86346
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 10060 bytes
SHA-256: fb07e326e0ee19657bc67880355a042e2362c2cdefb0b258811d31113a1d2a32

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