Malicious PDF — malware analysis report

Static analysis result for SHA-256 272ae54ef99fd002…

MALICIOUS

PDF

68.9 KB Created: 2020-11-13 17:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d0bf41d8ef8af24ad5ffd35de0e1e124 SHA-1: 50c42981b026119549d04a068e829fa8eab59264 SHA-256: 272ae54ef99fd002db8436cc061daeb52f8071ff4489d48af92a29e15125de52
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=prince+azim+net+worth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f91ff812e566.pdfIn PDF document text
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/4648391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f927830f1625.pdfIn PDF document text
    • https://vutifiruva.weebly.com/uploads/1/3/4/5/134595151/fajagovusokefe-jebotuso-fatagakofaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f89c45e874f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8f626b02780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f9bb40a21d3a.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/betimugi/71644004559.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/riviwizajadiziku.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/sibifidixijebililudef.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/gilotabopowedegis.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/puzob.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/osprey_talon_33_backpack.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/16369349458.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/baterias_bosch.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/us_history_semester_exam_review_answers.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_off0000cfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE1 4972 bytes
SHA-256: 7425ce3a522283b3834187d561c3dc43e231890dee95fc9803ec89245c3d89bd
font_01_sfnt_off0000e0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BA 11064 bytes
SHA-256: 5803727a381c023542238bf2f26771eb520bb803f0e69a120b344b8c7af53502