Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ce6c59b4aab5f0…

MALICIOUS

PDF

48.4 KB Created: 2020-10-01 03:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 594213285a1805907e15aad4c021fc19 SHA-1: c554c69a50fdcdfba7135dad06a7dd2c5e6ac999 SHA-256: 75ce6c59b4aab5f095ef6cca59d4d31266378cdf8cf67a5ce658b5c705d1e007
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=achilles+eccentric+protocol+pdf In PDF document text
    • https://site-1038503.mozfiles.com/files/1038503/regawokexa.pdfIn PDF document text
    • https://site-1037237.mozfiles.com/files/1037237/turisiberugo.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/katadirijesivepipotul.pdfIn PDF document text
    • http://jipox.thepeckperspective.com/uploads/1/3/2/6/132682711/18bccec75c7.pdfIn PDF document text
    • http://files.centervillestake.org/uploads/1/3/1/3/131380445/ff96b2c1de4.pdfIn PDF document text
    • http://files.myleafandcompany.com/uploads/1/3/0/8/130814286/3851c.pdfIn PDF document text
    • http://files.militzasiberians.com/uploads/1/3/2/7/132740836/aefdb.pdfIn PDF document text
    • http://rawutigod.izharudeen.com/uploads/1/3/0/8/130874284/d42427.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/1/0430/3277/2757/files/android_appcompatimagebutton_onclick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/patrick_arnold_chemist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6381/0975/files/49470230243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/67472901055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/fundamentals_of_engineering_thermodynamics_8th_edition_solution_manual_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/person_place_or_thing_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/42533807779.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_off00007c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C93 5024 bytes
SHA-256: a7f32c9b5a6d7bf17fc6c4b1cd146f3f07567e41215ca7203e73795f76473833
font_01_sfnt_off00008daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAA 12272 bytes
SHA-256: 746f53151c9a3e828229e0b6352cf6d91d028c2d3a15fd85e35869d807b7813c

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