Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ce819e15a4d529…

MALICIOUS

PDF

45.5 KB Created: 2020-10-14 18:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 316c677f4ead0cf792962d489c7f6277 SHA-1: b02e90f34987459eccb3001e83535bb5d8972ff6 SHA-256: 33ce819e15a4d529cb4bfa839e94d54bc3615b220b23b0d27a5a145d72c3c8a6
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://ggtraff.ru/strik?keyword=manual+da+maquina+singer+facilita+pro+4411 In PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/7419874286.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f870ddde02c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8704db153a7.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://uploads.strikinglycdn.com/files/d82ba867-935c-4ce1-9506-14d73c3daf24/84469664882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28fe4ba-2140-464b-a4d9-8f619fa9ea16/siroteboxelukawuramupiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302fdc6f-3e79-4057-9ea6-0643ee59744a/52620385820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abac863-da1b-4cf3-a715-3c35f4fc653f/jekamegekobelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37518ffb-a244-420a-bb74-c362f6030cde/20928537082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa91236-d4a7-4d84-b448-f7b1bdc0a74c/95333954323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27cecfc-b7ed-4f5e-994d-a4672ce83e7e/tamotewotibitapojukul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cbe1d2-af5c-4951-a4bc-20d6c7782d11/mumizapodipafotape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33282e4-b930-443b-895d-34e15283e41f/mewelesezegateta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9949/5842/files/chm2211l_final_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6159/1197/files/dvdrip_latino_downcargas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/97365536934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6978/7300/files/mobile_phone_tracking_system.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_off00005869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 5628 bytes
SHA-256: 49763cf5e25597f2dbef2e024ec4612b1cd31f3bf531e823eda41da9d5e5c0e6
font_01_sfnt_off00006b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 15792 bytes
SHA-256: 4815c0bc6c88064f0cae2385e55c13a86b867bcdb8397784e8763a8159c18d61
font_02_sfnt_off00009a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A54 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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