Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c974e5c15da79d…

MALICIOUS

PDF

43.3 KB Created: 2020-10-26 22:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1d3b658826c7269739eda90aed9ecdcb SHA-1: 80cac48ef97837d76406e184905d6fd34a7d34f1 SHA-256: 26c974e5c15da79de141fd994ac01b0af3b646d9a76f6d5187e2ffcafe42e3a4
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=student+connect+ccms+union+city In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f89d0334501f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f8b2000b6503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8fcffc5d08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f8c020ba9447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5f93663a44f21.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2580885.pdfIn PDF document text
    • https://seguronudolag.weebly.com/uploads/1/3/4/4/134468074/tefusar.pdfIn PDF document text
    • https://poroxokinawutaj.weebly.com/uploads/1/3/4/5/134507376/6003537.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/bolepiwosojetiloveja.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/6dad58ab.pdfIn PDF document text
    • https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/nivovadexukosal.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/sazava.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000067f4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000067f4.bin)
    • https://cdn.shopify.com/s/files/1/0493/0522/3327/files/91048839630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/vobuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4410/7950/files/5154530675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2294/2871/files/tejido_epitelial_gartner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/treasury_interagency_agreement_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/plantilla_calendario_mensual_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2945/8852/files/ffxiv_anima_weapon_questline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8237/5864/files/create_function_in_php.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8929/2184/files/south_jordan_middle_school_classroom_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/pug_and_chihuahua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0662/3384/files/the_evolution_of_style.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_off000067f4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F4 4952 bytes
SHA-256: 7a66cc01d850540f7f6bb1e07f7ba17737d45baa0989fc47bcc682378169f67d
font_01_sfnt_off000078bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BC 11040 bytes
SHA-256: 2589892c5bf116de901d130420dee9a470f03109f0324081ce0e545dded73d0e