Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebb4c9f60c75b51…

MALICIOUS

PDF

72.3 KB Created: 2020-10-19 13:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0b3f09daf3497983e0ab6fcdc2a56d94 SHA-1: 70dd9d710fc9667b0738012fe3bf032582f374d9 SHA-256: aebb4c9f60c75b5196443df3b51f413f0dd44c639794dbc44ac778b91fec7170
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://gettraff.ru/strik?keyword=fox+et+al.+%25281980%2529+found+that+the+ability+to+use+binocular+disparity+develops+between In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8934f7760f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8d358d8865e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8c899b8e9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f88ce4b1ab7f.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/5179092.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/wubolabiv-jajujove.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/mitibejuxuxod_zapekewopa_xugogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f87d3dfb3ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f89570625191.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/1/0495/4721/5000/files/kasud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/nekerazeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/11562951998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667798b9-0893-4b79-9d9f-cb8797a0dc06/befejugaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c94bc72-562b-4d07-89c5-4b28716c9a89/en_esprant_vous_voir_nombreux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d8ad67-ed89-47ab-9580-a2c6317a8351/nakus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/maltese_puppy_cut_before_and_after.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/tefegavutov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5277/files/nike_football_brand_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5936/2973/files/calendario_academico_metodista_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6595/6760/files/filing_practice_exercises.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_off0000d857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD857 6388 bytes
SHA-256: 54187ccfdcc5ac49737a3bbfaf8d478b25e2bf3cb72d4bc40b1e48342fe3f9ed
font_01_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 10728 bytes
SHA-256: af024efcbd6a17d2b5ae79655d5720d0705fcd71f6999add427c2c971ffd762c