Malicious PDF — malware analysis report

Static analysis result for SHA-256 c519ed20181e44c5…

MALICIOUS

PDF

50.7 KB Created: 2020-10-28 16:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 31b1e7e87521a4c676efc1fd5d2ccfce SHA-1: 839fe56754c54055573b3eb65cd7e54d3b6b6d5f SHA-256: c519ed20181e44c51f1b24723e494c40b295903fcd72d618ae7d9bb3eb48735f
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains numerous embedded links, many pointing to disposable hosting, and one specifically to a known malicious redirector. The document body, though obfuscated, contains the URL 'https://cctraff.ru/123?keyword=glenn+berry+dmv', suggesting a phishing or malware distribution lure. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also attempt to trick users into executing commands.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/123?keyword=glenn+berry+dmv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8763d0ccf5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f8b595b39005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f92c27f9ebf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f8bcd34dbeab.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/eeb6f.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/taxasafavo-walavito-tonifugobukim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f98ee368244a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f898db18c79d.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/xupedulig-dokefe-tulozakopodi-nisixupafof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f887dc17ba3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f8aae2a88ef4.pdfIn PDF document text
    • https://kilorokininoru.weebly.com/uploads/1/3/4/4/134470368/dumunezunewiwumobom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8b5ee41d55e.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazutun/caldera_acuotubular_funcionamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/senaxotijotupubu.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/77358711230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4941/8389/files/how_to_add_a_friend_on_discord_on_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9766/9791/files/heil_5000_furnace_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/acute_pulmonary_edema_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/rugizubufemat.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/august_monthly_calendar.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_off00008374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8374 4916 bytes
SHA-256: 2a805578271e31d0877b54481c3fee5ba0290b1c2c0bf536f8c690b022ca831c
font_01_sfnt_off0000941f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x941F 12876 bytes
SHA-256: f54ca97aded4826469192fbfc5ac5976340675b762f734a021cbe7eac8957b8f