Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1962d4de805ac9…

MALICIOUS

PDF

44.5 KB Created: 2020-10-22 01:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6af158a1ecf5c8444d70f8bbf75a4caf SHA-1: 952e2bb57fb5835ac474d54e167145876319dd09 SHA-256: 9e1962d4de805ac9ed22b7cec10d72488669a350b7481aa177552bf18a51ae05
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://ggtraff.ru/123?keyword=7.s%25C4%25B1n%25C4%25B1f+zarflar+konu+anlat%25C4%25B1m%25C4%25B1+pdf In PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/750535.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/8019822.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/a7f91e4c9.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/26bf6.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/zodafapinizu.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/7557898.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/b3120e47405f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8bb59758166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f86f89f593a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/subud/62012938233.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/aadhaar_form_download_in.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/initial_treatment_of_hypertension_nejm.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/67388618329.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/52206874760.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/13079020990.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/masug.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/mopoxafugotawatumevis.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/storyboard_examples_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/78388755739.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rezagefujixarawisaxixas.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/lithium_ion_battery_construction_and_working.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_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 5064 bytes
SHA-256: a8af82c4eb01d743174711acc496d9a9a36a65d269e1b424b02abce8b36818e7
font_01_sfnt_off00007149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 11076 bytes
SHA-256: 3c70a70aefd3e33c3e5d7a9f6998b538642220eb755b99478b4741725e0fd34d
font_02_sfnt_off00009485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9485 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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