Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d64921a34b8ff7f…

MALICIOUS

PDF

49.0 KB Created: 2020-10-25 09:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 46efedc914cea205d9b077da27413381 SHA-1: c8551eddb830177105db2fd71e322b1ee8e8d6f1 SHA-256: 8d64921a34b8ff7f7ee95181af381832b310aa39f727932bc0bbf961c1c4eb5a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=teacher+appreciation+letter+template+pdf In PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/7225686.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/262045fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f8e201159488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8746b90e18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8758fd9be14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0937/5896/files/tememavafewejalowuwudawim.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/73232624176.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/routing_protocols_ospf.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/gametogenesis_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/black_s_law_dictionary_10th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/ri_judiciary_smart_search.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5053/5578/files/kenok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6780/0736/files/32706665789.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/chemistry_formulas_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/75239245916.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_off00007ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF5 5164 bytes
SHA-256: abff1b0ce74c8cbbe4ffffe2c42cf3f837bebadb246b755e425616c14326d25a
font_01_sfnt_off0000905b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905B 11336 bytes
SHA-256: 3661c5bdd76c0d95a8f967e620a4862a58a7fd476a06214ea5892fee0d5e4f0f