Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e0994088659a16…

MALICIOUS

PDF

47.7 KB Created: 2020-10-27 09:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 6b5a48fba34d62073d951dd1d5e29203 SHA-1: ee8da79a49cf4efa098423c6b597374f8391c91f SHA-256: 28e0994088659a16ae1edf865f998b0670705fa269aafa4899b5fc31defd786c
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.cc/123?keyword=rise+of+the+supergerms+science+world+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f89bd00437f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8d9363c4b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_5f966a234ad1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f92fa8505ff5.pdfIn PDF document text
    • https://lopuzidijunusi.weebly.com/uploads/1/3/4/3/134378181/nasesa_zisenivutukage.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/8661809.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/5105209.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/e64b5d2bd3.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/0156fa3.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/bajuse/absolutismo_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sepokerewesomavoduwegub.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/wusugobudo.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/libros_de_ana_catalina_emmerich_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/statistics_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/26483260527.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/wojarimizexajuzevetiga.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/biblia_hebraica_stuttgartensia_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/learn_german_fast.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/45411422313.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/boundary_element_method.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/castelnuovo_tedesco_fantasia_op_145.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/cambridge_checkpoint_math_coursebook_7.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/common_core_math_standards_grade_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7001/5638/files/what_video_games_have_to_teach_us_about_learning_and_literacy_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3594/0793/files/iphone_notification_bar_android.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_off00007a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A12 5668 bytes
SHA-256: e8bcea849acf4abb53982fee0171be62ad4d9e53c0020714311592543c5bc07c
font_01_sfnt_off00008d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4A 10504 bytes
SHA-256: ed20af8830c353a605c199f79542cfdd578147c2877da098baf522729a236493