Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7976c31918d86d…

MALICIOUS

PDF

46.0 KB Created: 2020-11-06 21:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 86e8dd93b12cee5329fd90e28aadc811 SHA-1: 6eb22380868a9e1785f96db05ab3c06791ed28da SHA-256: 1d7976c31918d86d60eaaabab5f897739f5d3e0bd1dc13ed293e15a2e2f7eade
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=juan+de+anza+elementary+school+hawthorne+ca PDF link annotation
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/gumilixolugow_gexetu_sozurunafo_xerajejozipelod.pdfIn PDF document text
    • https://luxapojago.weebly.com/uploads/1/3/4/3/134327771/29aac.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/d3f202ccafd.pdfIn PDF document text
    • https://givexikiduxa.weebly.com/uploads/1/3/1/3/131398224/bd2edee.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/5e8d256f2b.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/8584913.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/bc3c77c.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006631.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006631.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009cfb.bin)
    • https://s3.amazonaws.com/juzerilem/catapult_king_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/44320690323.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7088229-15b5-492b-aac3-03e93dbda722/chicken_invaders_6_free_filehippo.pdfIn PDF document text
    • https://felibule.files.wordpress.com/2020/11/5485573432.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/ziwumixuwadizixagujukeb.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/bt_yahoo_mail_login_issues.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_off00006631.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 5244 bytes
SHA-256: 47221acaf004ce0fef3cf84637a0aeeadef47b3555866e341a82a2fa75aabc56
font_01_sfnt_off000077ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 10872 bytes
SHA-256: c36f38dfd085370e55be58bc4be05575bf32115f8d1d9387e8767e85b0829ae8
font_02_sfnt_off00009cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378