Malicious PDF — malware analysis report

Static analysis result for SHA-256 45db3753a9a8b293…

MALICIOUS

PDF

79.7 KB Created: 2021-01-25 00:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c71bb1d529b327722932b6c93a413964 SHA-1: 57a38322fdc7327f2f4d6ae9090de2c98bfab626 SHA-256: 45db3753a9a8b293ca100b90a5c6b3664348eb21a537ac9b1294ff122dd0e021
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/123?utm_term=what+to+do+when+your+bored+at+home+on+school+holidays PDF link annotation
    • https://babaperivagam.weebly.com/uploads/1/3/1/3/131379833/9529265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fe47f0a9bb02.pdfIn PDF document text
    • https://mituwekema.weebly.com/uploads/1/3/2/7/132740464/merefaza.pdfIn PDF document text
    • http://shtampshop.ru/wojuduzarunagurelelordlgc7.pdfIn PDF document text
    • https://womukowewefe.weebly.com/uploads/1/3/4/8/134889771/9072348.pdfIn PDF document text
    • https://fodukajanewirom.weebly.com/uploads/1/3/5/3/135383911/tatasaxid.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/7ac6f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fd674d1a6f64.pdfIn PDF document text
    • https://zufodivovogopot.weebly.com/uploads/1/3/1/3/131383523/619b4c98.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/068837622c5fdd.pdfIn PDF document text
    • http://djami.ru/cnc_router_table_for_metalwxitc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fce4cfcefd67.pdfIn PDF document text
    • https://namikefazexu.weebly.com/uploads/1/3/1/6/131606603/tobajavetut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_5fe8109e99a80.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/826cb3cfff591b.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_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 5524 bytes
SHA-256: 85d7c88f5ad5db2f095e2d3e328f81430a5c9a2e7f34823a7b8b1dbe8fcde86c
font_01_sfnt_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 11416 bytes
SHA-256: 10155ac28e2f16680277251b15cfd09571d98eeffa87f6ac45fd9475d3148d7f