Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4065a472feb3cff…

MALICIOUS

PDF

46.4 KB Created: 2020-10-30 15:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b0a7bf72607a4c7cbdfe0a8a0221c2d9 SHA-1: d0a777685196349d37ee1f9068e90a93fad3865e SHA-256: d4065a472feb3cffd101bf09f425783555c26616d802f1777c01ea052c391325
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=arc+heavy+gunner+clone+wars In PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/1045201.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/5860532.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/9384386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f8f09fe32021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8c8c7d09e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f8d394271fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8b63ab8151c.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/jepigupivewezi_mikurorefajexi_ruzesenazoxasa.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1995322.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/bogirisekede_mexelasutezovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a06.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a06.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009e80.bin)
    • https://uploads.strikinglycdn.com/files/6e22447b-31c2-4665-b10d-bcc057723e6c/judukobomutuwenab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6984/4903/files/vamusobopiriribot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2734/8635/files/limiting_reagent_worksheet_2_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9807/0948/files/algebra_1_test_4_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9453/7898/files/11641604250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221d4733-33f2-46fd-9e14-33abe5f3d4e5/kozemafipu.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_off00006a06.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 5056 bytes
SHA-256: 5e77ca72b3c011883b1332e056b93df0c4a1b45ea8de6ee04aa365b83dbfe959
font_01_sfnt_off00007b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 10324 bytes
SHA-256: 1e91fa5bdbd1e590c5a803e1150d2ebe9efd9fca5afcbae4ad1b07fec9b878d9
font_02_sfnt_off00009e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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