Malicious PDF — malware analysis report

Static analysis result for SHA-256 83acbd8fb215b941…

MALICIOUS

PDF

45.1 KB Created: 2020-10-30 06:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0e615824c45c97824d0e168f67ec16c3 SHA-1: fb9b9cd99d4c47548f404f8e9036eefecb8c5996 SHA-256: 83acbd8fb215b9417daf9c6017ea83ee14abe63e4012d5c39c746f6ff0c959ea
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=look+homeward+angel+play+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f9982b4b12aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f8d1e70013f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f92dbc895841.pdfIn PDF document text
    • https://jelafabonopavu.weebly.com/uploads/1/3/4/4/134443296/misitejopibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5f945c5071b10.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/1/0504/3830/7994/files/85615418840.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/25774162413.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/essentials_of_biostatistics_in_public_health_third_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7403/4600/files/organic_nomenclature_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/rosivogu.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/kasudojepu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/84549843231.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/70498815668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6993/1172/files/21353872436.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 5476 bytes
SHA-256: eb6e23c74b0c2486ace8951879a6d7f504788bb6c20ab75b50b863a246f3ac80
font_01_sfnt_off000081f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F6 10924 bytes
SHA-256: 3f06fe6e2c29cae7fd0f9c5a3c1d8f7503a3c2b043bf335c881f05aaf2c4ac1f

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