Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90d24ff9027e487…

MALICIOUS

PDF

45.9 KB Created: 2020-10-27 21:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 35255fad8516a2b435f409653f3150e8 SHA-1: cfa80caf674c6ec5aa48d48c99f672847f5ae5ba SHA-256: f90d24ff9027e48799e3a8ea64e4821f40e000534cfa325cfc4f32a6635bd8d3
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=te+extra%25C3%25B1o+carta+tumblr In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sosuzadi.pdfIn PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/kofefuvijiritipev.pdfIn PDF document text
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/061bef0c1.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/mivawarezin_pemupib_bimugozutudufib_kadesode.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/9079236.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/redatenopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5f90129da8766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f9002378e8aa.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/1/0434/2536/6165/files/27986659297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2389/1618/files/pufowukibexejejukewar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2578/3190/files/45541538482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033513da-e4b9-4cbe-9370-30acd36f3454/dhoom_3_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba39fdad-799d-4247-8913-e11c2ff2b6fc/18821794300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c831fdf5-377b-4db6-a822-033a71164ccf/koxada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad5e9cc-a60e-4b40-bcd4-e6a4bb95032d/63235184481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/powers_and_roots_worksheet_year_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1459/4982/files/2.2_properties_of_water_biology_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/solving_multi_step_equations_kuta.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_off000073dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 5136 bytes
SHA-256: 00f4cb89eb632a205f3429eaabaee042915948bb566d427313a1551f6a480d21
font_01_sfnt_off000084fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FB 10916 bytes
SHA-256: cfc78156cd7879b1fd28918503742abc609c07fc5325b356ecdd4325bed95a7c