Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd2f331522a714b…

MALICIOUS

PDF

48.3 KB Created: 2020-10-26 08:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e2e07ea9e461d5ddf09083384e5552b8 SHA-1: 63d7a0d42152a930b9629436c6d15192b98e7e66 SHA-256: 7cd2f331522a714bc7367fb17844303cf11acf05c311f78e051741c1137d468a
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/aws?keyword=how+to+write+acknowledgement+for+school+project+pdf In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/47c4a8cfc698.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/xonitunusis.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/nuvotebanepezax.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/wuvegitefep.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/ruwesovoraje-potif.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/a08c6c6b.pdfIn PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/nodif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f90893085bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8c9c56310f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f88c20d5d291.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007d17.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007d17.bin)
    • https://s3.amazonaws.com/henghuili-files/basic_spanish_vocabulary_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/66187173291.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/laxesinobadoxarumusipiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/two_dimensional_figures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4608/1957/files/wagekubit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/quantum_heat_pump_installation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/speaking_with_a_purpose_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/fejonefubofiwunitidenano.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/76411568510.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/arunachal_pradesh_road_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/beneath_this_man_download_free.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_off00007d17.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 5764 bytes
SHA-256: 75404c2ff72b1c118b7466f977b99a970e3bce182ce4b4612489a1f957971a86
font_01_sfnt_off0000909c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909C 10140 bytes
SHA-256: 91e42780f83eed55b4ff2e3969f824b0daea65e0afc4fba22012e2ed76b70e56