Malicious PDF — malware analysis report

Static analysis result for SHA-256 3510efcfb3d072b5…

MALICIOUS

PDF

41.2 KB Created: 2020-10-12 04:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9480acbe0fe8da202c1c841d841559fd SHA-1: d491ebee1b096b1454e2a686a61d465d1a35f3c7 SHA-256: 3510efcfb3d072b558fb516815af85ca38270ecfb5c25fcc81a6fd431c3c6d69
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=david+bowie+five+years+torrent In PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/67152013428.pdfIn PDF document text
    • https://site-1038612.mozfiles.com/files/1038612/kusuv.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/54759684155.pdfIn PDF document text
    • http://kepapaga.nicetynecessities.com/uploads/1/3/1/6/131637308/6069443.pdfIn PDF document text
    • http://komozi.sewakwelfaresociety.org/uploads/1/3/0/7/130775288/mujulovu_lijabadiri_kaxitiwesoruwu.pdfIn PDF document text
    • http://regor.doityourselfdocumentaries.com/uploads/1/3/2/3/132302780/278312.pdfIn PDF document text
    • http://xeketaro.yoyomamadesigns.com/uploads/1/3/1/4/131438121/3668020.pdfIn PDF document text
    • http://bisobu.shopgreenhaveneco.com/uploads/1/3/2/6/132681361/e4b030a69ee.pdfIn PDF document text
    • http://files.golfmanorsynagogue.org/uploads/1/3/1/4/131482833/9708860.pdfIn PDF document text
    • http://suvil.chimerebaker.com/uploads/1/3/1/4/131408170/492480087cd.pdfIn PDF document text
    • http://files.taorinjapan.com/uploads/1/3/0/8/130813934/gutuvorejoruf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/exploring_energy_program_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/31166654423.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_off00006063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6063 5260 bytes
SHA-256: fd23210357056d3eefdad618f7c879b49706a8b5e7116b93aab599e031a06ec7
font_01_sfnt_off00007271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 11152 bytes
SHA-256: 19989afcd3ce018dc099d3fbeba49afc59274133bd3de9fd73c7bebe761d39f3