Malicious PDF — malware analysis report

Static analysis result for SHA-256 705a9837be886320…

MALICIOUS

PDF

51.1 KB Created: 2020-10-23 11:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 8ed13ce67b021924fa9a2ffe8ea0776d SHA-1: f4c57eba1f2aa29c356efc226674df33ea3b61a7 SHA-256: 705a9837be88632085d3f472b4134cd7a39df893a3ca58d5b060dc9b6136d93b
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://ggtraff.ru/123?keyword=manejo+medico+embarazo+ectopico+pdf In PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/joxirologufi_zawazasu.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/tunodewir_tubipiv_gebaja.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/vuxomotijuwur-getegimineza-gamirad.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/fawukako-ludujudaf-nalizoxuzawu-xumip.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/d40ccf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f8962bac722b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_5f90dd310ef85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8eeb6c83410.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/nozonuvodovazigev.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/wuxifabasogamorodugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/jaburumekuzimegibikolisor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/links_awakening_guide_ocarina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5338/3581/files/9109482448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7757/3025/files/xoluludenonewisafo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 3460 bytes
SHA-256: a6dd02e495e420ac627f52f314f43bb132dfc9ec3b7c1fcae6d5a4485c194f41
font_01_sfnt_off00007905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7905 5152 bytes
SHA-256: 8b4169418779f059fcfa700f3737d9592f36ecb3c0f24101cb3832fe1ed4321b
font_02_sfnt_off00008a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A72 11236 bytes
SHA-256: cefd75abb37582847f278bbd8bf840fe30bf39f7d9a4ed477faa100ba6985664
font_03_sfnt_off0000af3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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