Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfed587f55f8f825…

MALICIOUS

PDF

47.3 KB Created: 2020-11-01 10:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4782661d491e4d2bed11dba7b3359776 SHA-1: c22d5c5a69821a1ddfe5ea167418bdc32d5dc3b5 SHA-256: bfed587f55f8f82574a875d4f18983b50aaf0883408a369c4d1f6df2a9d163f7
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://ggtraff.ru/aws?keyword=coptic+calendar+new+year In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f876a52ead77.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/sonavusorutim-xofakejuvo-nelupewuzejed-nukejele.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/1231422.pdfIn PDF document text
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/284610.pdfIn PDF document text
    • https://pakezumada.weebly.com/uploads/1/3/4/3/134368128/tuderosovaxugiwutim.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/zumivogo.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/gitilopude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5f9cb79179c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5f9e4a4a6454f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f8fdf5d44c06.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/tesapibebujep/78594371547.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/crazy_little_thing_called_love_queen_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/cash_flow_statement_cbse_class_12_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/thief_stone_skyrim_location.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/intelligent_business_english_book.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_off00007b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 4988 bytes
SHA-256: abfc7805e97b07cd4e54af92efcc5dc0f4155078d8f02af28c349d8ff498d189
font_01_sfnt_off00008c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C18 10592 bytes
SHA-256: 7ebca733243f5dd82c2fcb3e09c816832b21e775a55f02b80e9b5b9ec56ac2e8