Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49c43fcc98bfd21…

MALICIOUS

PDF

48.5 KB Created: 2020-10-27 21:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a596844bb44d1ff3eeb2d94f22e57809 SHA-1: 116eab1f32f81c42408641da0aea088c380752f8 SHA-256: a49c43fcc98bfd21e0367cc98a80a0821a053b0771ac8d064dbb63347d274bdd
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://ttraff.me/123?keyword=westbank+community+library+austin In PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/7ac1c46e726.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/xudotozizagavege.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/5994678.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/7598084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f89d22b4d8a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f8a06b259298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f89a36975878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5f9750149c562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5f97441bd7946.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/dovulavavo/authentication_authorization_and_access_control.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/falezibes.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/99423733615.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/xavebudugelipowokame.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/prescriptive_analytics.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/agriculture_in_india_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/pomifipidexod.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/91532247313.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/java_programming_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/cardiopatia_hipertensiva_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/97606455721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2754/1409/files/befonufomolirokun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1966/4542/files/87231247887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/gupopanopasunolemupila.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/bijupoxub.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/nudalasativ.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/mapevum.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/cabinet_ministers_of_india_2019_in_tamil_language.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/annemarie_schwarzenbach.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_off000062f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 5264 bytes
SHA-256: ab4b665f6552ff12cd22cbe9f58750cfd6076abc6e5ca53b259ec9783d5b380f
font_01_sfnt_off000074d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 11912 bytes
SHA-256: b93b39d23393a7ce52e4a5321bfc86d37a8c724e1d260310df4111ac06c68ba6
font_02_sfnt_off00009cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF3 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15