Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad1e61fc63aa607…

MALICIOUS

PDF

47.9 KB Created: 2020-11-07 06:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6605774c913221d78f2b73efc60e4f92 SHA-1: b7736cfbe022446bdf58d008e2b54425d6fd0ded SHA-256: 5ad1e61fc63aa60785ca373e3690556aa33af2a73e5ba58d7137eeabcf4bf1ba
182 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?keyword=champion+juicer+manual PDF link annotation
    • https://pamuvomamutafa.weebly.com/uploads/1/3/4/3/134305197/1726829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_5f9dd5f5f2cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5f94a5c48b891.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ca253b-0e71-4c55-9285-6dc821339499/chatytv_canal_caracol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff5987c-6e8e-48cc-8a7c-cd1424e96c6a/frayer_model_template_word.pdfIn PDF document text
    • https://sumifomigat.files.wordpress.com/2020/11/11815544020.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/nopozave.pdfIn PDF document text
    • https://bovalov.files.wordpress.com/2020/11/mktg_lamb_hair_mcdaniel_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/click_to_play_game.pdfIn PDF document text
    • https://lapemebotu.files.wordpress.com/2020/11/71585697742.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_off00007d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D78 4976 bytes
SHA-256: 5e9a0bd52b75a3a0dd9800a142402c0b1e139d41d567eac8aede5d7cca6b1808
font_01_sfnt_off00008e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E36 10988 bytes
SHA-256: 1bc7ffa1ae81bf1cea8e3e1477fdf83a7adbae66cbd1b469cdc3c9df98646b62