Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aaa508649881b05…

MALICIOUS

PDF

60.2 KB Created: 2020-10-02 12:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7995e1942df36cb11af9c0fdadc7bb8f SHA-1: b5c0068727f896681662fdc868a5bea5725ac36b SHA-256: 8aaa508649881b05bf1a647a39fa0e17a144079015f77b4e133297d04a7b643b
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://ggtraff.ru/strik?keyword=credo+catolico+largo+pdf In PDF document text
    • http://files.dancingatthecrossroads.com/uploads/1/3/1/3/131380146/gopizidadinopizo.pdfIn PDF document text
    • http://kovetozo.drisabelfranco.com/uploads/1/3/0/7/130775997/temofawifogar.pdfIn PDF document text
    • http://koxarenik.bbnla.com/uploads/1/3/2/6/132681763/vesakamimo-povevusikivul-latij-pupalid.pdfIn PDF document text
    • http://wipifav.peterdeshane.net/uploads/1/3/0/8/130814283/ketikag.pdfIn PDF document text
    • http://dujet.thenottinghamfour.com/uploads/1/3/2/7/132740815/3a404.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/1/0438/3087/0173/files/vujakotexunuvivimepaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2990/8637/files/zombotron_2_time_machine_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9148/7645/files/delta_table_saw_parts_36-540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6dabb26-5e90-4331-b971-1be53cc76a75/lupugafolosenalonani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47feabb0-ad3a-4bc2-b55f-4dc90a6b6f43/gajatesuzogulomelesuxebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b717789-43b8-487b-b226-a8738ff5d4b5/fabinadusuwopazijoxedun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdf83c8-709d-4dcc-af03-c544c850b91f/sudubitapakujidujonedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ca8ffb-13c1-401d-8012-ec241575db2c/kikumipulibejumesexezoniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc34f99b-c9df-4765-8a96-09271bda0eeb/34465055472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5304f035-d7b2-4721-95b6-1591c497017a/fezumijemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8429536a-22ba-4056-8501-e4f4674820e6/mogadenaxobataguzokebaguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d1e6de-0ebb-4494-ab77-e32c69ed251d/39753390836.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_off0000a372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA372 5048 bytes
SHA-256: 64ff57fd5439e71c121bf7b86ea881fe2f25ccad1a47b4c7d3394429feb4fff8
font_01_sfnt_off0000b4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AD 16584 bytes
SHA-256: 13fc60bec97f03224d3405848dfdd201c812a50f460d3cf757dd6c11e6729b29

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