Malicious PDF — malware analysis report

Static analysis result for SHA-256 35730915619707d2…

MALICIOUS

PDF

41.3 KB Created: 2020-10-09 04:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c9b473aebb83aa6d3d99ec1edf200df4 SHA-1: 74ea077147109f3f263600a13b38bdc693ec1095 SHA-256: 35730915619707d26740119a2d6a1dc01dd837f2de0b91f070b9f96dba22dad7
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/pify?keyword=wheel+in+the+sky+keeps+on+turning+steve+perry In PDF document text
    • http://files.hopespringsfarm.org/uploads/1/3/1/3/131380258/ruxijumotuv.pdfIn PDF document text
    • http://files.allischley.com/uploads/1/3/1/6/131606197/rofizez.pdfIn PDF document text
    • http://files.wrenpaediatrics.com/uploads/1/3/0/9/130970016/9894855.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/rufetezujir.pdfIn PDF document text
    • https://site-1041483.mozfiles.com/files/1041483/xuwan.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/56099006810.pdfIn PDF document text
    • https://site-1040396.mozfiles.com/files/1040396/kumozuzixaluzuwagisoxoxan.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/1/0429/5049/2323/files/arduino_nano_programming_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2596/8533/files/showbox_apk_invalid_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2632/0024/files/20932301547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8646/6210/files/gifted_kids_survival_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/research_grant_proposal_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6324/1632/files/care_based_thinking_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8538/8704/files/ponowamovewewapexete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8814/5303/files/hitchhikers_guide_to_the_galaxy_online_book.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_off000064b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B0 5108 bytes
SHA-256: 1cb33e0579abc56e5a6f62039cfacd453f6fc9244e1b2615d906a4961fbf0f13
font_01_sfnt_off0000762c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 10044 bytes
SHA-256: 2244933e5920cb342bb60d58edb861fd8d9b8fa82a04af36a979670ddc16b4d5

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