Malicious PDF — malware analysis report

Static analysis result for SHA-256 18180085b2ed6538…

MALICIOUS

PDF

66.4 KB Created: 2020-11-07 04:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d184cbe044900a9d39f951c53f568a86 SHA-1: 0d53bd108a987007daa596eef37cf1a192eae7d2 SHA-256: 18180085b2ed6538531e4e415c1cf2941888f3e9594416a468f525da8b32ffd0
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/123?keyword=bridget+jones+diary+pdf In PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/gugufobuvitulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f93444898f95.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/vatanisevumagevufoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8a117616bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_5f9f5e3501b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5f987b4ab9ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_5fa195dc99b18.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/vexotuse-vurigumodore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5fa31a3e94177.pdfIn PDF document text
    • https://digufotunu.weebly.com/uploads/1/3/4/2/134266503/nolakibizo_viviru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lixuzab.files.wordpress.com/2020/11/otogi_spirit_agents_gift_code.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/dental_decks_part_1_for_sale.pdfIn PDF document text
    • https://lukarilovaj.files.wordpress.com/2020/11/power_pressure_cooker_xl_manual_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/26171377478.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_off0000bf8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8D 5404 bytes
SHA-256: dd5de4165b9a58cfaa05d95feb557e57569de33d3e6ba9c9dc4d470a2c18dfb1
font_01_sfnt_off0000d214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD214 12456 bytes
SHA-256: d65e9126e99e1470a8c6d850fa548872ab1ad89c4daa5e1334c47a0243bd23b0

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