Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e34d492d47b9b5…

MALICIOUS

PDF

42.2 KB Created: 2020-11-02 15:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 26ad6d55c62a836a12704f8cd72ebe84 SHA-1: 19980a0173797f3c2dbdd2b6570c6e2cddd47fdc SHA-256: c8e34d492d47b9b528ead7dc01886f77ad835dffada22634d34fb1aebccfac04
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://gettraff.ru/aws?keyword=886+area+code+va In PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/puxigewapit-semeziguxo-tijimevile-lopafobodize.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/1/0441/2165/3400/files/big_easy_grill_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c499464b-7bf4-4f88-81b9-3bf00e0d1a66/xexazaxogili.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/65078198485.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/zotoxopovuvokewabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6209aa31-68ca-4eed-a3fc-59c64037c20c/24655611283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8add0049-3993-4dec-add1-d6f298c981e9/25314307342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e183feae-9741-46a2-aba7-0eef23af1fab/37221439252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0b6ab5-1e22-42af-9082-b6172e1380b5/movimientos_en_el_plano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407be4a8-cb9b-40e7-abc8-6322deee9ca3/keruwowaso.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/fetofibir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b00187-ccbe-48ef-8e3e-1b70b384cc2e/playing_blackjack_as_a_business.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_off000068d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5036 bytes
SHA-256: db4f0d5d4323c503df430ce31603d57544e85f3b4f35bf85086b886daa7101b7
font_01_sfnt_off00007a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 10120 bytes
SHA-256: e94f9b91b7c9c18ee79307fb1473f313d10fe93dbf97f63876a883ce509885fa