Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad5ec4bc01838e1…

MALICIOUS

PDF

38.6 KB Created: 2020-10-13 17:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7e82523130ea5a158991592178b16532 SHA-1: 06399835345abe865dfc30851f59e60dfa55f305 SHA-256: cad5ec4bc01838e1ef66140f6fc7052f8b70c721f23771465e75fbd3727542fd
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://cctraff.ru/strik?keyword=shimano+socorro+sw+6000+manual In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.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/4d9917e6-0426-43b6-b600-06565d88d54b/25277442758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97774fb-f0f5-47da-a7d5-f8561eb77b3b/lizirilixamikoxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1212665-44c9-448d-80bd-192b50b6d6b6/67980565985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95976498-21df-47b3-8a94-3dd797d083df/togujebadekuvuzosepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385d1a90-de37-4864-8bc3-b98ce19cb29d/94017692788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6980f10b-f6e7-4d79-89e8-bb732c3564ef/sebufazojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c42e538-a7c9-4b69-a98d-c6f07ecdba02/kamawunuzarulose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385e6ea3-8b9d-4049-a9ce-62d95d1f4a76/sipox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3a7ba3-613f-4ccf-8aaa-da8086eba8de/70698415482.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_off00005747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5747 5532 bytes
SHA-256: eb83c46ee86b075d98757be58a2876e85cc17fc2a7c12cb1cf708fbc21793bbc
font_01_sfnt_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 10424 bytes
SHA-256: ae4653993ca2b6442657d0ed9991b53527abfdc38cd551e2b9550e139233d818

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