Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa677d0550790e7…

MALICIOUS

PDF

43.5 KB Created: 2020-10-15 03:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b3c45c9f36efe6fcc4353086cf9f8ddf SHA-1: e1efa4dc9d679663f8df031016a62304113eecc7 SHA-256: 4fa677d0550790e746f54e972a436d8ace4f0f304cd5f7ae3cf5def038215de4
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=manual+do+candidato+puc+sp In PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/mamip.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/wewezupusirafu.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/gumupedi.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://site-1039642.mozfiles.com/files/1039642/tidojujujus.pdfIn PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/fidopisezinotilamasewe.pdfIn PDF document text
    • https://site-1037868.mozfiles.com/files/1037868/dowilixoxixew.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/rizakifezuw.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/sodotipa.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/7411.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/xerimeloxozefas.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/1/0482/6700/2020/files/practice_guidelines_for_management_of_colorectal_polyps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4028/4101/files/ad_clicking_jobs_free_registration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/f_zero_gx_dolphin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8309/4934/files/binigofiwijojamokakezan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0651/3311/files/girewedubowabanegexixefop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3638/0831/files/the_english_horn_is_of_english_descent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6918/4421/files/infinite_flight_simulator_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2195/3955/files/54481261336.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_off00006bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBC 4976 bytes
SHA-256: 935ed415315711395aac063b0e85ca5f6fc378c06626eaa4ad49f40c7c85a543
font_01_sfnt_off00007cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBA 10600 bytes
SHA-256: 3a5ba0bc10c9e26c4a66a161cd96d3cc1a4b902abb3089cb2a10b3e4100f6edf

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