Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e15c1e5b47597c…

MALICIOUS

PDF

35.1 KB Created: 2020-10-29 05:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b042721932d6e42c1ee58bd88d12a17e SHA-1: 9664fd3ce82f9c05209dd458d175457f57e3cd06 SHA-256: b6e15c1e5b47597c7a27be14c9124351169a77f09584edeeb5cf72e96742a244
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?keyword=hatch+guide+for+western+streams In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/godede.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/wemogabufekatu-xarepevigilo-xinixixapasi.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/leluvisiwotawi.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/7302827.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004d45.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004d45.bin)
    • https://uploads.strikinglycdn.com/files/77ad191d-c1a7-4cf6-be65-c37b7408cafb/golds_gym_elliptical_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/pampered_chef_trifle_bowl_stand.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/cambridge_advanced_learner_s_dictionary_indir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/budget_tool_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f491a543-8366-4154-80ba-cb8653cf29b6/mizokogoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c555689-841c-44d2-9710-f01ae8118863/37435312406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bf25de-9756-4f3b-9554-1bf9da5eda39/jenor.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/anglo_french_rivalry_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a485671-c8d1-4b0f-ad84-4b3281b79a43/dujodixupipafisoluneg.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/pengenalan_agama_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/practical_english_usage_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ba0327-8fb7-442d-a6d7-b7f0b6b30dff/53809399997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1df361-90b4-4013-9c4c-280d0f48d424/iced_tea_maker_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28848bde-1b41-409f-b2db-fbbcbd388e1c/sipojazexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d1807c-f66a-48f0-807e-5e622ae62098/how_to_uninstall_voicemod_voice_changer.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vba_excel_multiple_sheets.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 extracted file (font_00_sfnt_off00004d45.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D45 5456 bytes
SHA-256: f382424c926cfe10eb42d330c20f7b93f66bae3c96dad4c42d299968d2125762
font_01_sfnt_off00005fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 9244 bytes
SHA-256: 51ed3d5fefdb63ef57a10e15a17bb1ab33e9961066c79d844fb024eaabc4c449