Malicious PDF — malware analysis report

Static analysis result for SHA-256 887e4c71d7c423ed…

MALICIOUS

PDF

38.1 KB Created: 2020-10-12 14:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 67b71e4ef1709bc10bcc61c7041abbae SHA-1: 73d59e10216fd0990859e9c8863143e5a3a12516 SHA-256: 887e4c71d7c423edf15117c4931aa7a64737f656b15f429538e081af59e4742c
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=livre+tout+sur+nous+pdf In PDF document text
    • https://site-1041934.mozfiles.com/files/1041934/bizesesisif.pdfIn PDF document text
    • https://site-1040094.mozfiles.com/files/1040094/jetikidosufaji.pdfIn PDF document text
    • https://site-1037868.mozfiles.com/files/1037868/xuwubokibarojipov.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/75085901995.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/89303956964.pdfIn PDF document text
    • http://rekena.newhopepcusaasheville.org/uploads/1/3/1/4/131453133/jimiv-tefuvunabim-dusovuganin-nodegus.pdfIn PDF document text
    • http://feruga.rayslicenseplates.com/uploads/1/3/0/8/130874277/e01880c47c9580.pdfIn PDF document text
    • http://files.jwpcc.org/uploads/1/3/0/8/130874585/7f8ae2d90.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/1/0266/9359/9410/files/verses_of_praise_and_adoration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2170/9724/files/two_syllable_compound_words_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8632/3352/files/roasted_purple_potatoes_and_cauliflower.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/57645542383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/ranik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/44348066772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6980/0089/files/enhanced_moorish_nationality_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5740/0994/files/wolunirutimepop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/manual_pole_saw_pruner.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_off000055b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B9 4796 bytes
SHA-256: 6019b31d633ce8125518ea4b816ff5da302b9a46146f7ef9b18b316f98c3d0b1
font_01_sfnt_off00006624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 11616 bytes
SHA-256: ea66bab6b9c1125c3e466ba67f1e5e9162f57fc6770725e791b1dcccf7a38fc1

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