Malicious PDF — malware analysis report

Static analysis result for SHA-256 6965010d1f20f160…

MALICIOUS

PDF

53.2 KB Created: 2020-11-09 05:05:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 227a1e22cbcdd938debee1139a0716f8 SHA-1: 0ef4d07ca442f4d3e1fb184e566dc0d9e6a47e41 SHA-256: 6965010d1f20f16020bd9fcb327e36cc1ec804569d10566e74349d3c244b5b8f
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://traffmen.ru/123?keyword=excuse+letter+for+school+burial In PDF document text
    • https://jedotulaxadetin.weebly.com/uploads/1/3/4/5/134587896/fipikegasi_ronelisomiko.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/femawabatiresuvut.pdfIn PDF document text
    • https://galuxenezinex.weebly.com/uploads/1/3/4/4/134437763/muner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f91da54a428f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5f9c6985978ab.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/fizaki-guvodabo.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/dovawidateg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f8c5e5a7bbe6.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/e43db07f-c3d8-4ef2-9168-b18f858f935b/31652778205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62096947-41bb-466e-b44b-8f24b0d37330/67398044745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45973df1-c09a-4b20-af4f-45a9ee6a6586/homeworld_remastered_general_failure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f55a531-a663-4d34-8491-9d8ff49b7b3c/xadijorunuvokiwuvarupug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a0d9bf-3951-4c29-ab53-cac570e5d3df/60188871208.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009c7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9C7B 24600 bytes
SHA-256: 537ab7aa9e4380cf1ca177110f8e4f270d64c0a17d0605c5a4db56d5b195e8dc
font_00_sfnt_off000067ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 5132 bytes
SHA-256: 27fe6d4ea56d5e33594efc4d6b411d4ab2c42475f162407f91644db8bc7d6856
font_01_sfnt_off00007944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7944 10240 bytes
SHA-256: 79c9036dfc6359c61b57c9624b8e26b2c32b92c76f61f03d6829744b12acf341

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