Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d99a5b1d7275eea…

MALICIOUS

PDF

49.5 KB Created: 2020-10-16 14:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 559145f04d08ddf44b0379f42af95602 SHA-1: 8c2d011c71a7d753124f2b0ff415c677ad35c90c SHA-256: 1d99a5b1d7275eeabe5cd0e03e40caaeb5c99ef8f8a6963e890cae1da051cadb
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/123?keyword=deltora+quest+forest+of+silence+pdf In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/4b8c0.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/tezetut.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/1/0428/7817/3343/files/wizanobubobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2685/files/80088708939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1224/2586/files/washington_state_birds_field_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1561/2834/files/tatevov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1093/0880/files/72998726782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9689/0262/files/xavubavujobogate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9172/0347/files/maytag_gemini_double_oven_manual_self_cleaning_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6031/2232/files/3_recursive_stages_of_contemporary_rhetoric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/windows_update_1909_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7601/0151/files/13452380092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6771/files/61897500391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0351/1445/files/sherry_argov_books_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2696/1816/files/vozawola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/diatonic_half_step.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8247/4181/files/zejak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a86e77-b56f-4bce-894b-7b658a16de6b/60237516784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a789e71d-9b94-4622-844b-9696a99068e0/646820846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ed3748-a56b-4529-ab2e-32d0a0ecd69c/47467557532.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_off000082ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 5272 bytes
SHA-256: 0d8d96a4705e1d4499631caf45c2cc07b74a2f2edf8f2d7ef001abcc1e24955e
font_01_sfnt_off000094e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E8 10324 bytes
SHA-256: 5b65138e39f082383707fee6745e2d1302f046c878492f36171e9803d1d5678f

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