Malicious PDF — malware analysis report

Static analysis result for SHA-256 083c6e0b806c7533…

MALICIOUS

PDF

44.0 KB Created: 2020-10-31 06:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 56868b77ea4aa730cccea4bf7e01dedc SHA-1: 2b4acbbfc05c59ffafe9304870a9c2018c4c07e0 SHA-256: 083c6e0b806c753383e8b9bb40b6cb355f5e00fec8813103e09b806f06941dce
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.me/123?keyword=big+damn+sin+city+pdf In PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/2145551.pdfIn PDF document text
    • https://pegebitejujag.weebly.com/uploads/1/3/4/4/134445458/727f69ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f88b8c32b86a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f90ecd1033cc.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/susopuzupure/ashampoo_free_activation_key.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/short_business_proposal_writing_skills_questions_mcqs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/pobebupusexumatapofagoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/grizzly_tactical_customer_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9504/1211/files/fitarifosadubejixuzuwaju.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cbse_12th_accountancy_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8885/2632/files/rrb_group_d_syllabus_telugu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/98376147344.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_off00006c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C33 5496 bytes
SHA-256: 0f800e7fc35b1f687d0091ce26b1bbaf96067dbc7cb3db895af5e5769674b220
font_01_sfnt_off00007eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EED 10808 bytes
SHA-256: 7967596422850be3a4ecd4fab6611f71f2940026abc70ea89bf0d4d77baab407