Malicious PDF — malware analysis report

Static analysis result for SHA-256 192731bad6d7c7e8…

MALICIOUS

PDF

49.1 KB Created: 2020-10-07 16:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b0ad88a273df3ce9dfc94df530c918be SHA-1: 2c55869e480af77e104f449aeea7fd335601e093 SHA-256: 192731bad6d7c7e86f9b82b44bfc4c2f56b1bcb99a96dde6df8a8fcfd69c7cde
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/strik?keyword=watson+crick+wilkins+and+franklin+worksheet In PDF document text
    • http://dilipe.jetsetnomad.shop/uploads/1/3/1/8/131856190/bipojuluzatifusofupi.pdfIn PDF document text
    • http://files.motherworkscville.com/uploads/1/3/2/7/132741109/ririb_gokomado_rutudapejejifu.pdfIn PDF document text
    • http://files.cambderma.co.uk/uploads/1/3/1/4/131437640/91fb00.pdfIn PDF document text
    • http://files.vitodorazio.com/uploads/1/3/0/8/130874339/jivuwi-kilut.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://uploads.strikinglycdn.com/files/b00df187-425f-4c4f-9cf7-697ffbd49c4b/pelibaluvodowuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b56a44f-5e18-4dda-ab33-d4acb1632f18/49037073761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a820c23d-8fc4-4213-a27a-3ac4ca95893a/71273996495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4273/6790/files/year_end_reconciliation_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1345/3470/files/77154118988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7608/4646/files/dystopian_vs_utopian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/maryland_renaissance_festival_discount_tickets_giant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8646/6210/files/section_2_the_spanish_american_war_crossword_puzzle_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0446/4799/files/91755890035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/3237749309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/unblocked_games_google_sites_for_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2345/3341/files/craigslist_in_tucson_free_stuff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5659/8692/files/45611700648.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 5068 bytes
SHA-256: aa1a8e24fdfcbee94e56d3a9923ab2059fe77c8ca5c9349cf8afa104ae29e264
font_01_sfnt_off000085e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E3 10112 bytes
SHA-256: 2399631969f7bf491898b8f8fd1a58a455aff3a1786d46d4528fa39971528842
font_02_sfnt_off0000a886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA886 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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