Malicious PDF — malware analysis report

Static analysis result for SHA-256 2deef1d1b8e8debb…

MALICIOUS

PDF

44.5 KB Created: 2020-10-30 02:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 41e7bab92bde9da0e28a324dbb2c5fdb SHA-1: 6ce52125f586567a6d769ee7c4b688f25001adc8 SHA-256: 2deef1d1b8e8debbc3b6ecbdebdfb6b7caa81511d2d61baeb6cb64a9f17e1c8a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=denton+county+probate+records+search In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5f8ebd26d49c2.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/7783228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f98d41d7b025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f9056932b504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5f97563e7805d.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/pozokimepe/sutaxogagipamorefepewagej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032904c6-06e0-48a0-8f15-8bf76fa5cf38/45008000709.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/midivutulamefedusezowejig.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/assembling_and_disassembling_of_computer_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/blood_draw_tubes_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/83262334908.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/daxazegujitewakutavolar.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/ridugonokepezidigoduno.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_off00006d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 5368 bytes
SHA-256: 7777beff43f8c3c872695e143a0c0a632272442ae5f69a0f2967b796a5255dc5
font_01_sfnt_off00007f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7B 10908 bytes
SHA-256: e3511ee74f4e5a0b6bd60e74742f97e6ca5dcd609ec34e629243815c2555142f