Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57e04ac5cb52afe…

MALICIOUS

PDF

39.3 KB Created: 2020-11-01 11:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 99aa7b69b35e2292ff7cd8c06fc09fbb SHA-1: 26e320f042c8a6fe80dc881bfcfebdc2e9070f39 SHA-256: d57e04ac5cb52afea0d40b64d379fbd91b7ce73d15e577279a880417ce581a1b
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=cute+keychains+for+teen+girls In PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/dedf5a8a2.pdfIn PDF document text
    • https://doxeduzawixufak.weebly.com/uploads/1/3/4/3/134383044/wevumukamuge.pdfIn PDF document text
    • https://nusokusin.weebly.com/uploads/1/3/4/3/134350978/dafoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/21297423933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bc62ff-f898-4298-87cd-ebff43c8c127/wesley_chapel_dmv_address.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/33986422597.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/bricks_beads_and_bones.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/september_to_december_2019_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f57b1c-f35c-447b-82cc-54185abb7908/53610580454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef220be-9b98-466f-9373-c71cd184fb1c/minergate_ethminer_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e486a1b-a835-429b-aba6-71d974c35901/spanish_comparatives_and_superlatives_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043b9870-47bc-4679-a753-ecca21dc8f92/vuzonevoja.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/brahm_kavach_path_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4ff78a-5857-458a-8091-3c799d832f18/pozamakomojapewajazix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1529de7-bab2-4184-9194-abd548b92075/fufulanabegobowevotojur.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 5212 bytes
SHA-256: bc0bf6953725c22be6cf9dd1ee5966d3798b4b1739af1b767ae0b490f7a68d74
font_01_sfnt_off00006bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD0 10712 bytes
SHA-256: 76b22e458de5aa34787e25e5415d54cfd2a9759a98804d4222f964f7c51c10e6

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