Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60d287fcea4e611…

MALICIOUS

PDF

50.0 KB Created: 2020-10-01 06:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 784ddd96ab741bd930c453fa2e9c2a2b SHA-1: bac4721cb1a3cb0111af5692ae8fa104e8d137dc SHA-256: c60d287fcea4e611a43c55f7343b84a0a8a84f0d9cf9a71cbe4429a65efce621
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=application+software+pdf+file In PDF document text
    • http://files.sydneybrandingservices.com.au/uploads/1/3/2/3/132303194/147c0c8adc8.pdfIn PDF document text
    • http://dimal.eahfitness.com/uploads/1/3/1/1/131163635/1b1f3554cf13dbf.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/a565cefd-027f-48f9-83dd-d137a8c2eefd/8259297743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49930520-b179-43a2-8955-4773528ed812/45364274906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ade140a-9999-473c-9992-b9119df93532/91917069385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4fd897-36a0-42a6-9125-6563848e6e10/70144393750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53594f1a-e7a8-4796-8ff4-9becf1e1543b/6216807428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a14720-4775-44fd-b715-8d3b78dc0604/parisupupadobuvidotaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9087/8372/files/kagawilalabipuwaxiruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/16302448248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/72718651762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9014/1344/files/76604108627.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_off000078c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 5016 bytes
SHA-256: 05013b06a15af6bcbf9640eb75bb2d145ba02ce5ff67b3d7d867b2f6bc632184
font_01_sfnt_off000089e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E2 10280 bytes
SHA-256: 8d2163dccb026eea55153f1076f16fe11a1fcbee8ccc7846aa1293da9f1061d5
font_02_sfnt_off0000acf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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