Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d6530f20800fca…

MALICIOUS

PDF

61.5 KB Created: 2020-10-13 14:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 84094c1dbcb272e306d272cde539c634 SHA-1: 30bb310e33463ab8fb24b0b86f989d65988535c5 SHA-256: c6d6530f20800fcadec409218ac48967f18e645b167ecb79afe138e3df54f5e5
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=cold+rolling+mill+process+flow+chart+pdf In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/logape.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/1/0437/6467/8807/files/55126652808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2269/4046/files/lawogovomixupewavepikuwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/panasonic_fv-15vq5_whisperceiling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2166/4160/files/common_core_standards_math.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1920/4765/files/bluebeard_folktale_from_which_country.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/spencerville_sda_church.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/standard_no_conflict_of_interest_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3616/3747/files/maximum_ride_manga_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3897/8460/files/gamatejojoporumep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/ff7_buster_sword.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_off0000b2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D8 5564 bytes
SHA-256: fe65ff8b9896a3bca2200d5418d01bd35fafea7d26dbd757f178dd807fde15c2
font_01_sfnt_off0000c5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AA 10448 bytes
SHA-256: 12377d982c259e170de8e5340774667e84e09e04669d4443ae7727b40d70c798

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