Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40a404933b827b1…

MALICIOUS

PDF

49.3 KB Created: 2020-10-24 19:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4222e187790d7b4717821fe7b0389260 SHA-1: a09016135e5fecb6b6c40194f4b5640a73dd11b9 SHA-256: c40a404933b827b1ff67a19ad3fac866f1ba6b026ca4d54d9d4fd0b49bddf515
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/aws?keyword=bmi+chart+for+male+and+female+pdf In PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/tetokesajemidop.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/semagewe.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/6677827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f8ceeafa0a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f90df49cc245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5f8dac2064362.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://uploads.strikinglycdn.com/files/a340ac86-5717-4ff1-a235-368b1082b236/69106208901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c456279-a393-4547-9dd1-2d8da6b9e630/39147571081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9503a1-1ae3-49e4-b4e2-14d6051399af/93261439143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdb0994-b092-4cc0-80c2-4bda47c4b22e/51982863647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c3cc309-1786-43c8-80a8-061197290147/denukutanoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb19aa-0377-4a68-a66e-b5ae5413a55d/11792620820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d32391-83d6-42fd-a555-f520e18ec7c8/frozen_full_movie_on_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fifa_ballon_d_or_2015_votes.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/7655947609.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/adobe_converter_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/jugozipusenepuwaxovopile.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/befenufuves.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bobubikavizusujaga.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/25603283275.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/barron_clothing_catalogue_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/sazulalume.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_off0000722b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 5052 bytes
SHA-256: 1dc7cfb736b83ae10b54c6ad688a553cc85ae5d7efb4bfae99a100b40d9baad0
font_01_sfnt_off00008325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 11420 bytes
SHA-256: a4ce992f4cf9457c055d3bb8bacf34103e9a9f27d01fd06dc141580f4cbe9e6f
font_02_sfnt_off0000a8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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