Malicious PDF — malware analysis report

Static analysis result for SHA-256 610176eadba114c5…

MALICIOUS

PDF

59.3 KB Created: 2020-10-07 11:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 16dcf50b2f374c1a29ca8011f52b598d SHA-1: b36420f51844c9165c25ea2434a36ca30d0449c8 SHA-256: 610176eadba114c598b48c7d0dfadf329e743f750e7c52a5ba8568fdc3ed04d5
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://cctraff.ru/strik?keyword=calibration+curve+equation+pdf In PDF document text
    • https://site-1039915.mozfiles.com/files/1039915/1649292462.pdfIn PDF document text
    • http://mekopuno.newhope4children.org/uploads/1/3/1/6/131606228/tukozowedokapemut.pdfIn PDF document text
    • http://files.lucylawrie.com/uploads/1/3/2/6/132680974/ridawezenedi.pdfIn PDF document text
    • http://files.thecapacitygroup.org/uploads/1/3/1/3/131379894/1649921.pdfIn PDF document text
    • http://ruzutib.robesdecoeur.com/uploads/1/3/0/9/130969465/dibodulu.pdfIn PDF document text
    • http://rupimipo.danavallarino.com/uploads/1/3/1/3/131379732/jolad-jabisaxog-xaxulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9536/2209/files/types_of_buses_in_computer_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7609/4614/files/31377693796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/stock_market_game_ticker_symbol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8462/0991/files/you_better_be_good_you_better_not_cry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/1654/9286/files/i_saw_red_lyrics_sublime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd0f047-1c9f-419e-a4ab-8361b5ee5a52/75025359075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7a8bd2-c187-4e8f-bd25-6e7a1703ed90/koxisutovupepiwinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b73980-494b-47c5-95ea-fdb9a2d6b7c2/8007083131.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_off0000aa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA46 5200 bytes
SHA-256: ef3279436a80a71d5fd741eda019a2c76bf70b3e79866b59dea615f1914264fb
font_01_sfnt_off0000bc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC01 10600 bytes
SHA-256: 7dc55b0f6414ef175387c4106d1d8b4a25ca3538ff60e8961732a91b5b7ae0ac

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