Malicious PDF — malware analysis report

Static analysis result for SHA-256 93706285b310273c…

MALICIOUS

PDF

41.1 KB Created: 2020-11-05 23:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 3df78cffb391598b186aec7ec974bde4 SHA-1: 4513b0b0e613272ee94ad311e6576239ec4283df SHA-256: 93706285b310273c0625b1453ae6c851aea1baf83aed9d71881d0643a6bd701f
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://traffking.ru/123?keyword=refrigerator+compressor+noise+diagnosis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f9e6afbbe024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5f9594ab79718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_5f9811745a77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5fa1c094089ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f874ad3b1d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_5f8ff430a9ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5f924e726818f.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/2577621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f9441636319d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujapu/18832492658.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/que_es_el_amoniaco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/petroleum_geology_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/26378175367.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_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 5448 bytes
SHA-256: 20d80ca7c633cdc8b0aaaeb38330b37e15b25bc7328ac825f0ab82a351169983
font_01_sfnt_off00007384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7384 10540 bytes
SHA-256: 9d3a5a016ed47b2c8b8a520161e1909d06bd717dee1b781c2c41ccd43db9b456