Malicious PDF — malware analysis report

Static analysis result for SHA-256 077f9edbcc4a7edb…

MALICIOUS

PDF

44.4 KB Created: 2020-10-21 02:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0300b2f68cdbc03df2d322b23febfdf4 SHA-1: 65a204fef863a81703de2bf8215a5c92f2d5729c SHA-256: 077f9edbcc4a7edb13b3e095c8ad4b88fa928baf336a9066e337152ebdc3706d
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/123?keyword=records+management+policy+and+procedures+manual In PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/bakovopu-petanofage-dobegozofudupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f889b6b459af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5f8a2b3b453b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8712cbd8e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f87cb5430652.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/garejidonuxuf-tevapev-roxomefaju-gekolu.pdfIn PDF document text
    • https://xofilovinavi.weebly.com/uploads/1/3/1/3/131379248/7988294e2349f42.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/30e19603-b6c6-4f7c-9a0e-9074a50ec81b/lekebalove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29156ec-082a-425c-8722-b5b318d665db/lunororegorewereferu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b26a24f-4de3-4ea3-a149-dd64ce2afeb9/sulolatogolidakabidixizux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8f34a1-5d2f-4796-9790-969b4cb3fd69/kutofiborefobidivi.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/xubuzidazagaganobudi.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/34978260674.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/abs_and_squat_challenge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5139/2409/files/rafinowewuxamat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/vokuwiviboguves.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_off00006f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F85 5504 bytes
SHA-256: b452e54f7d8614af2ce1d4a8187d6ae259acf18ff7a792631d21e3bb36bb5735
font_01_sfnt_off00008226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 9868 bytes
SHA-256: 6eae238cdec68aa211b98ddb457d50014e4859a72be78531160b06a9e5951968

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