Malicious PDF — malware analysis report

Static analysis result for SHA-256 515ce99679801258…

MALICIOUS

PDF

46.0 KB Created: 2020-11-06 13:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 65d4b92d0380a9d3e9b3c11f69d0c669 SHA-1: 2db6a327b16d7acd913d491be2d51be3b5dc27a4 SHA-256: 515ce9967980125879fe8869eb662f67b7cfd4ed3e067b345771eb7b55110720
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/123?keyword=deer+jokes+buck PDF link annotation
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/xumafiretojelum_puturila.pdfIn PDF document text
    • https://masagepa.weebly.com/uploads/1/3/4/0/134096256/xegofigesanifop_penuzexi_lebojozatir_papubaxor.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/3368790.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/komexirokomejojake.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/1507003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5f9cf5b4b4964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fa155a42ad43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f88a487decbb.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/bofawuferexuku-tokaz-gikozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f8c4fbddc909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fa14cc9a3228.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9830a589-a52c-45de-ad27-3697a831137b/tie_fighter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063a221c-d203-4a6f-b421-e5f1cf3edd51/stadtbibliothek_bad_pyrmont_findus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6473bfc-8d81-4b65-bcd0-c368d6685114/rokewaxamalimigok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80384592-24ab-43bf-8ba4-a7e11412532b/fishdom_game_hacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139b36c1-9b0c-4199-895a-9068507e31a5/cuisinart_deluxe_convection_toaster_oven_broiler_parts.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_off000072ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 4832 bytes
SHA-256: 806b41961aae9cb42cfd3c607571df129fe7039345fd0a2dd8f0ed7aef56884f
font_01_sfnt_off0000837c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 11500 bytes
SHA-256: a6cb1538aae99a4fefbb1e6aef026f73919a542467a750a49deda72601956c89

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