Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0d5caa124283d1…

MALICIOUS

PDF

45.4 KB Created: 2020-10-14 11:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 88242c3da846db44ed59481d1ea2766d SHA-1: c9394d9608a11dd28fbce2a434d07d579015d00d SHA-256: 5f0d5caa124283d1a33a35de78eb4a2ab0da59d97a3414c832ffa43b4f84fdac
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=przybyli+u%25C5%2582ani+pod+okienko+tekst+pdf In PDF document text
    • https://site-1041086.mozfiles.com/files/1041086/sokofanexixefoxafunevel.pdfIn PDF document text
    • https://site-1039999.mozfiles.com/files/1039999/nelerigobesenobowonisa.pdfIn PDF document text
    • https://site-1041579.mozfiles.com/files/1041579/58614162666.pdfIn PDF document text
    • https://site-1038629.mozfiles.com/files/1038629/644580728.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wozumadaku-mukevewurovebu-nefebo.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.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/46cf6b08-1f7e-44c9-a253-0f7c1fa17cda/72351147699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e34fb1a-6b4b-46c0-95f8-33e337d58118/nixasagupuvefuwemesez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/96836316604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/madozizitiwulutagenitap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/67846043226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/jiwogojuramo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/tonakasubuvegezubedas.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_off00005f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2A 5328 bytes
SHA-256: 30c90d762fc1aeff0a4a01e52113cb335886430135462610386cf3165930f970
font_01_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 12128 bytes
SHA-256: 1238ffff29eb7bff4141656e5eac384a30e0f049ccb5be783ac66583cae55a0d
font_02_sfnt_off000097b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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