Malicious PDF — malware analysis report

Static analysis result for SHA-256 b800188b20c47764…

MALICIOUS

PDF

46.1 KB Created: 2020-11-09 08:38:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 86df78d01ae584319ca94517cbd71abf SHA-1: f822a5bf0af8c44ca3585f9283137a124e545924 SHA-256: b800188b20c47764a73c973dae3761172523096f8645a0cb5bad1f90152cd4ea
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://traffine.ru/aws?keyword=encouraging+words+that+start+with+letter+e In PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/tewofi_tabumarede.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/tevowomoruzep_bejobuninuzivud.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdfIn PDF document text
    • https://gufevetiginuz.weebly.com/uploads/1/3/4/6/134626386/6178143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/tivavonupuwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a794368e-1bb0-4373-926c-0f77d4a9fe0c/vmi_scoring_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93bad5a-8e50-4231-902b-4d937e01b485/2665824541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ce002b-a557-4f75-803b-492835d5f119/32118043645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f99713-8157-45c0-b4a6-e9fc2aee67a4/69648701545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f81be2-0a9b-4d10-9336-4dc04fcdd4d8/tusubejozonirapawas.pdfIn PDF document text
    • https://sefenubif.files.wordpress.com/2020/11/53611136376.pdfIn PDF document text
    • https://gusebiro.files.wordpress.com/2020/11/22009771838.pdfIn PDF document text
    • https://pozaxatugifu.files.wordpress.com/2020/11/29847735065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c163e51a-0268-4c75-8911-0d9cbcf21d67/42807455148.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_off000073d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 5248 bytes
SHA-256: e2dfbc1db83f9ab717166732d1ca483e30552d4d2fb1c9f094ab884444921a19
font_01_sfnt_off000085bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 11132 bytes
SHA-256: 4d74f3861e6d5646a270e597f834af92fc66250fd5d70852657d1a8283ff64b5

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