Malicious PDF — malware analysis report

Static analysis result for SHA-256 29605375f5c8b4be…

MALICIOUS

PDF

57.1 KB Created: 2020-11-07 08:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 20b50ce121d48a7bb3e3b898ba69b163 SHA-1: e93df0ce2b25d445f74011a8bbaf599ece4fd3f3 SHA-256: 29605375f5c8b4be26f89da68ec42d57bf3e167debee34d111057b11698ea949
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=latex+cv+template+for+powerpoint PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5f9a1df566da5.pdfIn PDF document text
    • https://weratirotiset.weebly.com/uploads/1/3/4/3/134322017/a2ad2dd36.pdfIn PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/rimukufifurav.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/zofoxibivogub.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/zokivofesuvewu-sopotidumeguw-robejibimo-roziremoramite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5fa16275245c3.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/kikunojulejuj/oceanography_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/magic_duels_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decaf200-8e0c-4be9-8d08-0dff1e7eebbc/zobogakejososor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0c35fe-4fba-4018-88b6-e0eaeb47e693/garment_costing_sheet_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/80516168514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac339025-389d-4d9a-b1c4-8dd50dfdec6d/realidades_3_workbook_answers_page_51.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd167575-3908-4c98-803c-da5a85a85b1c/towazetogerumaxamorolu.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/22619499151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82db94c6-e68d-4fba-a35a-80b2230d6fa1/97189748953.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/ganesh_atharvashirsha_in_sanskrit.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_off0000a19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA19D 5144 bytes
SHA-256: 12e6b67587459b4bbb14606e40d38e0e7aaa97ae819ee1ce11f302ad2b98b7e4
font_01_sfnt_off0000b329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB329 10628 bytes
SHA-256: f7f2717c84def949fd52e252c5f38a1ad94324aa0728bd0cedc79194b18d2931

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