Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8217eab1d074a79…

MALICIOUS

PDF

65.4 KB Created: 2020-10-25 12:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: cd55a9122a6da361241581ad64d9188c SHA-1: 8d24ebfb2c4207f6253055ca0aa21ef0df9f2f5d SHA-256: c8217eab1d074a79f5243876a297809a86913b7bf3e97c8ee4e4edf8f1dcaa8e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/pify?keyword=internal+gravity+waves+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f895d2f56507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f8a83efe78cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f91cff8c19c4.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/3299226.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/7176823.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/8fc8a33.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/lakati.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/566ba.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/tarajix/rediligipi.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/chloe_has_chlamydia.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/jusixamef.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/xanifadoninosigorivaba.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/autocad_civil_3d_2014_tutorial_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/45111078443.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/61483024053.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/51044816938.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/best_reader_app_for_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e097bf58-b60d-40d7-96a6-804b117e4f15/47816491391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02473dc7-13b3-4207-8923-d7023eb39504/vba_excel_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943eb069-fa78-4e06-838a-08b669a532d9/sudefus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bfca70-28bd-4eb4-a7cf-ef265439c210/5217285452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f161ab9-efaf-4880-8c24-dff6c7cfca4e/11507069734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d48f96c-040c-4b3a-8e34-88649569e7d4/53165819710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62ab961-ac41-4c79-b912-8a7b47815668/88563832726.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA321 5400 bytes
SHA-256: fc3805ce80212679ea46edea091f65bcd07dd00fe92e75b9f044781265815976
font_01_sfnt_off0000b5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A0 13252 bytes
SHA-256: 341ff650bf1cf88c1651db3a905715e2de0bd322068511c4727eaaceab7a0638
font_02_sfnt_off0000e1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AD 16212 bytes
SHA-256: 63cd03457ba21a6c814cb6ca3f340a1c2d38d85be41fe82c84e181fa694db59e