Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6783fc584d6840…

MALICIOUS

PDF

54.4 KB Created: 2020-10-29 02:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a620bc02dd3bedf520b48d2ab75796d5 SHA-1: f843fd69626544f3c24f7f5e86751298a9e8851d SHA-256: dd6783fc584d684013bc5574ab8a769ffba08b228f1c1ce451f340f861d6c99a
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=pathfinder+kingmaker+install+mods+manually In PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/wilevekuruvavu_gawodebeluteni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f8ef809b563a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8d5ed0601fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f874624b14ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f8d07bf1735e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f8de7c7212aa.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/bc31b4d3ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f93003119cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5f8e65d00588f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f963e22d6a5a.pdfIn PDF document text
    • https://xedexebil.weebly.com/uploads/1/3/4/2/134235570/fiwuxurakilidewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f990c4670733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5f99cd846b104.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/032c51c04eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f99a468e8f55.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/zepepenofoneduxeka.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000943f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000943f.bin)
    • https://uploads.strikinglycdn.com/files/c4f4ffa7-6944-409e-834d-e52d415eb1ad/star_wars_revenge_of_the_sith_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e9442d-e2b9-4560-9dd7-a183b43bfd04/22558413755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d010c58e-89e6-4f86-9b0c-7cae13828f31/puduwijibevasapetanolafef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1d319a-057e-4c72-a4ba-aa4cb3d76364/crabby_office_lady.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e9f670-d6e9-4eb2-9eea-ab5c55bdb5ed/ds_services_standard_coff.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 extracted file (font_00_sfnt_off0000943f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000943f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x943F 5488 bytes
SHA-256: 1534499e38d2438dd643cadb757950122e8ee4797ccec58099acc884406b34ae
font_01_sfnt_off0000a6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CF 10812 bytes
SHA-256: 5a5c3792a4f511109004626e7f7c39fded420623a847fd3b585de8e70a622bfa