Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed1c3d00d25085a…

MALICIOUS

PDF

66.1 KB Created: 2020-12-19 09:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b59dc663c8a4ea72efd21167d69c2f7b SHA-1: fa926e3388d26fc776db3394721f09f6f88b7bd9 SHA-256: 8ed1c3d00d25085a6b86ed61451efccd202029b5846c11163914a38d82a346da
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/square?utm_term=naming+straight+line+graphs+worksheet+tes PDF link annotation
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/wiviwesizoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450345/normal_5fa1112e5e094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fa5465eeb185.pdfIn PDF document text
    • https://dosarowit.weebly.com/uploads/1/3/4/3/134315771/596164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5fbd1053e9d34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471249/normal_5fc8c8bae0d3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a1e05f-1e70-46ca-9262-1dd023d87182/una_buena_forma_de_decir_adios_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ab1417-cee6-4a3f-941e-5319cc956b96/42177020620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4461dc6b-6cd5-4a72-bfba-0b53d32c2c03/joan_didion_on_self_respect_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1f11106e860cb96fca54/1606229778178/99291175506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc901d9-c2e8-4e87-938d-d639507e8ada/refurbished_portable_air_conditioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94bf0af-ad5e-4673-8c93-7409fcfbb908/77843267912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5219f46-54e8-46c8-9c8f-cd4d3e31174c/81987277140.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c774116eb00e3c6d76f8/t/5fca03f76a94db17e4961245/1607074810335/implosion_never_lose_hope_full_version_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4354816c-8635-4b55-804a-b90f0908c83e/57428517467.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_off0000c3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DE 5360 bytes
SHA-256: 0d10929db0bf39b120fb18d6f2bbc92f9d76c091e371d3bcb03986c294a3af73
font_01_sfnt_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 10900 bytes
SHA-256: f78a5afb498523454db4159330e3d229ad38a0d2cb0544771edc408c1321a330

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