Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ea450dd9dc86f2…

MALICIOUS

PDF

45.6 KB Created: 2020-10-16 18:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ff9134bd98c6c742f90a21177189bcd4 SHA-1: 9e813c7bd4dcba3f0c2bf14fab9b2f979641b1e0 SHA-256: 23ea450dd9dc86f26b896cb006beeb309c2dea2e24a12fbda140bdabc471bad5
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://ttraff.me/123?keyword=cafetera+espresso+manual+de%2527longhi+ec685.w In PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/54d357.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/lomodogigevu-nijuvinilon-xajipepofes-vixokis.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/zasage_jibeka_bisub.pdfIn PDF document text
    • https://kuguzozivef.weebly.com/uploads/1/3/0/7/130739994/gowekoxaxamozonolu.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/7784349.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/ragumefireduzupuke.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/lefanogarufuvin.pdfIn PDF document text
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/buguguriwivure-xezodiwozilakof-fakuxo-larimarixajipe.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/1/0438/6285/1749/files/padme_amidala_costume_plus_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1251/7798/files/43001074399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2082/2939/files/how_to_round_percentages_in_google_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/xikegixelati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2644d3d-6d2f-4d26-8882-07beb44a6167/14616128511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae48b784-6b2b-4b06-be21-885fd1ebfea7/dopuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac69d3b-ffcb-4f10-8018-eec565b2f266/3182973345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c417d6-9561-4a07-9d95-c520a686b785/70787158614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fbc4a0-834d-4f4e-a62d-73c8899f0e3c/kuxizo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691D 6104 bytes
SHA-256: eac98151243b1278a3276621274b90842cb15faf9063e130000cc38760660662
font_01_sfnt_off00007dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC9 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00008656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8656 9960 bytes
SHA-256: 7241923fd1102d4a1e982ec9219d25680587da6c9e5d8ed72feba6494df55f05

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