Malicious PDF — malware analysis report

Static analysis result for SHA-256 803d00ac8eb364f3…

MALICIOUS

PDF

79.5 KB Created: 2021-01-28 01:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 769d0715b088db770ea6ce7ecab18c66 SHA-1: 2cc92810d5b66d1764196bc553bc4040fde4fd1d SHA-256: 803d00ac8eb364f334e417b86baf832a3ce2ca0e3cf474b152cebd08f4c0cf06
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/123?utm_term=trigonometric+ratio+word+problems+worksheet In PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/188ff.pdfIn PDF document text
    • https://zumugewij.weebly.com/uploads/1/3/1/4/131483128/1036160.pdfIn PDF document text
    • https://gawujura.weebly.com/uploads/1/3/5/3/135325150/wugiratitu.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/bosaliniga-firipataxij.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/dezevasuduj.pdfIn PDF document text
    • http://molipetofokeva.22web.org/lagu_asmaul_husna_lirik.pdfIn PDF document text
    • https://wexetapita.weebly.com/uploads/1/3/4/3/134307875/6095582.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/xebodaxo_silazemotito_fopise.pdfIn PDF document text
    • https://nitejaxerovon.weebly.com/uploads/1/3/1/3/131379530/5586981.pdfIn PDF document text
    • https://dikasawo.weebly.com/uploads/1/3/5/3/135349802/lebibugovaki.pdfIn PDF document text
    • http://nowatora.22web.org/59098340539.pdfIn PDF document text
    • http://gituwema.iblogger.org/vejanuzexutosoviter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakigekoxigukil.epizy.com/62811978600.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/jogujubinawula.pdfIn PDF document text
    • http://konevimojo.epizy.com/31728111004.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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 5732 bytes
SHA-256: 15ef8efc0575b359b590d31de1a9ce642ea30ba7dc424a11c07fbdf9c53fd276
font_01_sfnt_off0001017b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017B 15268 bytes
SHA-256: 53a6b5a575174b6c1c35f45bba92a20ff5abb6163122d25695d4bb449ae6b109