Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff4ce6115f2896b…

MALICIOUS

PDF

51.8 KB Created: 2020-10-15 09:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fc7bcdb6ccb52e05423a8fdedb1ab26e SHA-1: e467fc4d23a5f4e89e51c32710d2479d90863d37 SHA-256: fff4ce6115f2896b563f141bd14f6b1ca0781380b1d51460cf251b98025d148d
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=saif+almarifa+mod+apk In PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/xalutos.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/devugiwofutuvava.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/a388d87c.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.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/1/0439/3009/1688/files/morop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9789/2030/files/tidukajuwag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0077/4046/files/38402843889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5321/7942/files/maid_of_honor_speech_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9484/4587/files/hoover_windtunnel_3_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fcce91-04d4-46ba-9037-d560c9e00db3/votebike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c617c7-e80f-4de2-b3b7-511a9df3a458/xikikosarogewegibomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7766/4413/files/hanging_gardens_of_babylon_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0601/7692/files/universidad_de_la_sabana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a438ea4c-c275-447c-a7cc-39e601363177/sizarudinanigifomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4477991c-cf5c-463c-9aed-564a0668ee4d/kubolafinajozixorobasep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b826a394-cc7a-47e0-b789-f6ab5d122c3c/rotezudunefegazile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b1d970-d457-4ac2-b86b-286f6f450e89/32750122857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d56a43-3a16-44aa-a163-f7e71e6760ac/76139778361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f902ac7-5daf-48a9-a656-83f8cae4645c/dipobilidapujugiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc6bbdc-ff60-4b04-aaa5-cbf6a90767f8/55741832347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ea26e9-3e53-4470-a075-4bdc4c8d4837/56851712907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e13b44c-9c8f-43d9-aa06-bc30a8c46117/ketututo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860b4c6e-67b3-4450-b958-0b582cbc5738/47560579304.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00008f85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8F85 28168 bytes
SHA-256: 21a72d055c3966b8fc8d6aa6bfce0f937ec951c44a5a3ee70e809abeeb57efda
font_00_sfnt_off00005e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0A 5176 bytes
SHA-256: f4c24270b4e8676da8cd160037f87dac7b388c3405622a04f3d91bd36aeebdfa
font_01_sfnt_off00006f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 9272 bytes
SHA-256: 1be8b3a147d29e4afd5c308e61734f55681ffbd87162182f0492a4fce4399e14