Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7382d03153eab01…

MALICIOUS

PDF

36.6 KB Created: 2020-10-19 01:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: af772b08a9ac9a9497693b64f86575b7 SHA-1: fedacc3817e06e7c03ba14d6a311134185522897 SHA-256: f7382d03153eab01f9fcfadb34b412b61587226e2228e6ad0f913d8ef5e76105
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=the+cosmos+4th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f8cae841287d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f8cbe0759c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5f8cbdc002714.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/juwasuvutuxejaf-nutumefagemilak-voduvivotu-robiledajolaw.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/16e051cd615a61.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/wosod.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/kefud_libepoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f8cbbb819ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f88cc8bdb6ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8c8abb9e8b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f8b97c17ce39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f872d42d53f3.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/0ef72708f789f22.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/naromofope_xodusotoruwonos_letigidajemu.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/senopovokusegi.pdfIn PDF document text
    • https://raxiruzaxulam.weebly.com/uploads/1/3/0/7/130738564/4063321.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/1/0483/5334/5699/files/polk_audio_owm3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/27986659297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/24037161049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9435/0258/files/23466159468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/36644928830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6755/3430/files/44033987441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/muruwinetematajalakulesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jozemebevokuzude.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_off000052c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C1 5096 bytes
SHA-256: 41dc44dfc4ade4bd4e49f52b6fb595a41bfdad4a650409a370f2c29393a55ee2
font_01_sfnt_off00006400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6400 9664 bytes
SHA-256: 77586f0e08e2c0b254e2edde3e843b39f1f829a4613ff7d9d6c2a9927ae0e281

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