Malicious PDF — malware analysis report

Static analysis result for SHA-256 875dfee9cd41e2ea…

MALICIOUS

PDF

49.1 KB Created: 2020-08-23 08:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5fa5be06337b2f5313994625cc6d6fdf SHA-1: 30e89ae9939f6901a518bea043a669322b47b0fa SHA-256: 875dfee9cd41e2ea595f59315ab708cd24d189ec0e72bca579fad173383f4f9d
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.cc/pify?keyword=manual+calculation+of+compound+interest In PDF document text
    • http://pakeki.evangelicalhistory.org/uploads/1/3/1/4/131407498/jimivesupale.pdfIn PDF document text
    • http://vegogijiw.sticks-n-stonesart.com/uploads/1/3/1/6/131606289/xodumogiwa.pdfIn PDF document text
    • http://files.itrpath.com/uploads/1/3/1/4/131406295/baxixirinewasutolize.pdfIn PDF document text
    • http://files.alissamittl.com/uploads/1/3/2/7/132710575/zevaki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8017/9109/files/public_finance_economics_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/national_achievement_test_reviewer_for_grade_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/69815754688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/roblox_on_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/66068872470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/wuwufoxike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/womimoxamine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/the_crystal_healing_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/11381377570.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 5188 bytes
SHA-256: de32d76051068771a651de6b300da27d559e85baa9c5cac6ebd01bb0bd73d61e
font_01_sfnt_off000083b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 10832 bytes
SHA-256: 72790f31fdaf78f60bf30767163fb1f5f6b2ede197066abbf1abbccfe634ec1d
font_02_sfnt_off0000a8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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