Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f07dc7b87b248d…

MALICIOUS

PDF

39.5 KB Created: 2020-10-17 02:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b184440675f2eb067a74ed8726b34917 SHA-1: 22fe22b0e59f88501bfb2b4f121897316a5a57a4 SHA-256: 77f07dc7b87b248d76c1a8cc962e2e2aea0d0176ec184110cb79cdccd659f948
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://gettraff.ru/strik?keyword=2004+chevrolet+silverado+owners+manual In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/vimosezexe.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/1036432.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/vukatibo.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/6128003.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/108d423a893.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/1/0469/0758/8768/files/68733570399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8067/9064/files/meade_etx_60_disassembly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6807/5413/files/biology_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6344/2598/files/luwusatadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e94260-99a2-4219-b4a1-66168a14c1c2/2465038714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e57137-7596-435e-92f9-8461a79d9860/22389348474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a7598c-1cc4-4f62-b4aa-d21e474b46a9/gukipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0753a0d4-52eb-4f4d-a2ba-eb79dfb5f2fe/8823435154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22d1b60-c6f0-4826-ba12-84b3bf776311/paruzamedovizefuwimevife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a087a176-4968-4bfe-b21e-d1c4cc2fefbc/75166137180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8894/6346/files/zuxatonafejerurasosuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7892/9569/files/amazon_slu_campus_map.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_off00005e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 5600 bytes
SHA-256: 14f734355558853ffe13bf74aace65ce8c382ea738f66f5bc8af764e9f23ed0f
font_01_sfnt_off00007122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 9300 bytes
SHA-256: c70e99af355aa5d50e4058501c4a921b7e9f05b9e056d8cf34d3f8fe8fea88cf

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