Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c819bbf1a4994f…

MALICIOUS

PDF

53.2 KB Created: 2020-10-25 22:26:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 97dc019978c34f94ce2659a2a1e31a1c SHA-1: d6e6e5a4c88e3263994861644de3ae2a4fd765c0 SHA-256: c7c819bbf1a4994f07a80e5af049bbba58c4f7ba47324af238ce4520f9686a7c
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://ttraff.club/123?keyword=pinzas+quirurgicas+imagenes+y+nombres+pdf In PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/95a3305.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/zupelamuf-juvoteremer-wazabovomuwumed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivuxo/pirates_of_the_caribbean_piano_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/xurozidizaxezusi.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/a_level_maths_p3_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/runesipofufamosekoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6039f604-ec2a-4eb7-bd57-2b287ff55140/viralaxijakiwovurolepavuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28dae74-7748-439c-ade7-b076be4e5a5b/kokide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57336d85-fd72-44d8-9602-a543674b8d8e/34982264608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28619048-6615-47ac-b5c2-c002cee5c985/17009405111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef17a1e7-f76f-411a-adaa-452d8c408294/vugoguro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca06c7d0-e85d-4c10-9c70-7becc9adce57/53764472343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7188098a-5cad-4c57-a2c8-88b6671abe63/xulozogebojusotesulibenut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b56ccc-767a-4432-8b86-fe05dc75369f/42539592208.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/wamofeniwawosuxut.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/ssc_stenographer_books.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/unicode_characters_table.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/lozeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f4369af-9174-495f-aac5-d79079116304/tres_metros_sobre_el_cielo_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6090312c-cc33-4ded-bfb6-a6ac18f9c000/51303023374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e8643a-8981-41a1-bfa4-7e90e5903339/7080123050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e06214c-bfab-428d-bae5-114c3f9994f0/69834035933.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_off00008b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B71 5860 bytes
SHA-256: e6731c4b67c0901207c7be9a4f2e18883b3237a085c476cf8180c1084a3e1003
font_01_sfnt_off00009f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F46 11616 bytes
SHA-256: ab5d9339731ea96f43e075fe1b4a56392856919251e5b3ee5c120d91c7e5becb

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