Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac26c289fe52045…

MALICIOUS

PDF

59.3 KB Created: 2020-10-27 06:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c3f0ecaa2845501f50eb2f9caee33afa SHA-1: 77be7f2037728ec7d274e694e2a703c857cfa1b3 SHA-256: aac26c289fe520456cc00770214f13e2c79b395098aeb01448b7b073eb498ee4
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=code+geass+cornelia+voice+actor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8b135e20d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f91fe6879dde.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/tuwejazurovesaf_jakizoleligow.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/3408965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laradusa/sdg_7_affordable_and_clean_energy.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/40226365150.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/budget_2019_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/english_course_communicative_literature_reader_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6c3cd7-8b65-45a9-9a49-c74d0300d1cb/36631679396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0e74c0-61c0-49c2-8250-67fc60dc34f8/43460546434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79ff7e0-709a-4a77-b892-38012a89e460/dodone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e91b667-ed10-4e45-8cbc-1cd3a5ec93ac/86793778735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa021e79-4599-4911-b47a-c18b152c84f9/86530187922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7549/1752/files/android_gerber_viewer_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8021/3185/files/wepuvobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/gartner_bi_magic_quadrant_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4936/9759/files/cat_535b_skidder_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8725/6480/files/46167792331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9160/0564/files/68729421999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4624/5814/files/simonde_de_sismondi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/mavutonusowujepadotewi.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_off0000a88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA88B 5072 bytes
SHA-256: 25a7217e41d024bf9d632b569af1cd1804693ccfee7407322ad531090104ddec
font_01_sfnt_off0000b9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E6 11056 bytes
SHA-256: 5498cfb9de43e4beb27aaf9878f3a24bb1e527c4a81869c20a6dca1204b45814