Malicious PDF — malware analysis report

Static analysis result for SHA-256 6903c4ae6c3142e2…

MALICIOUS

PDF

41.9 KB Created: 2020-11-09 09:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c10eb5761fcd524bd7fee44467425e56 SHA-1: a4f29c6ac1b853e1661f51f749f57b02d1fdd948 SHA-256: 6903c4ae6c3142e245dc1696219c784800097733013a4f8b6c255d731ad70a4d
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/aws?keyword=ironweed+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f93d678503ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f9f808297b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5fa89e55f17ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485173/normal_5fa8719cd6944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_5f98f4ac59135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kakutojuzi.files.wordpress.com/2020/11/pakistan_bait_ul_mal_scholarship_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/55174227189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5022226b-0ebc-4df7-8a73-7871b2afca74/low_glycemic_index_foods_list_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/24631947812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90dba360-f722-486c-ac44-ad35d5e4595f/96582307767.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/hearthstone_dragon_deck_mage.pdfIn PDF document text
    • https://fuvubuteluk.files.wordpress.com/2020/11/segeduvijapuduv.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/earth_science_june_2019_regents_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_off000066d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 4848 bytes
SHA-256: 3f691aeb8fcaadf3724a2cd5fcd39b88994d531ee62265e1d4018b026b612cf4
font_01_sfnt_off00007773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7773 10540 bytes
SHA-256: 7ddbc7e90d08b616060ebb7430d7035d4452c85d518538fba8f83a1bea44db3f