Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec83663aa0a42e8…

MALICIOUS

PDF

53.3 KB Created: 2020-10-29 13:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b5a0674e0e32b16b30dc060878c6c09a SHA-1: b2ceeac14d11a240843929263c7572f0a36fe253 SHA-256: 2ec83663aa0a42e84c4afd3f991132309790f7e5defee1853dcc6c205141c6c9
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/aws?keyword=name+of+the+fear+of+yellow In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f8aeb13095b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8d025b3d8c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5f928685dad03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8742b5306e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5f9543b19e486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f875b46d8993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f920789e076b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f9a4de345283.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/cb8148.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009332.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009332.bin)
    • https://cdn.shopify.com/s/files/1/0494/7237/2903/files/dosetomejotevedatolifut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5573/4167/files/treble_clef_practice_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3935/files/symbolism_in_lord_of_the_flies_chapter_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4101/9844/files/gm_diet_plan_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/dojav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8115/7796/files/49074765654.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/psychology_research_articles_on_stress.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/tipaxakorejakezake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6810/1286/files/cervical_cancer_screening_guidelines_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/zaxugafamozezixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/24090115417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7557/files/trail_rite_boat_trailers_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9033/6662/files/referendum_revocatorio_bolivia_2016.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 extracted file (font_00_sfnt_off00009332.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9332 4992 bytes
SHA-256: e041a6149e4d09ca97627224fac9787c4ce0bb36a626639528747799413ee3ac
font_01_sfnt_off0000a420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA420 10592 bytes
SHA-256: 69fb03c3e79e5efb8fa821bc8e155fc3c496ae4bcbef4d23fd0d835740e3559e