Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c812f14d511fdb…

MALICIOUS

PDF

44.3 KB Created: 2020-11-06 23:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 8d9e3847a4c9d4a87c732056a349121a SHA-1: b37f31a02fdf3a99f8e7a2a1bdbfbd9a987db67d SHA-256: c0c812f14d511fdb433b73c8783798697d627d838b7e9e61b0b89113dc03c23d
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://traffine.ru/aws?keyword=fremennik+isles+osrs+runehq In PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/5036761.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/2206312.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/tukowab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vixorujedujo.files.wordpress.com/2020/11/loxebigigarug.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/49363474932.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/biology_chapter_6_vocabulary_answers.pdfIn PDF document text
    • https://fovekurosuto.files.wordpress.com/2020/11/92915359040.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/sawewiwedegokalotikabu.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/methyl_bromide_msds.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/hymenolepis_nana_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/tagux.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/roblox_dragon_adventures_elements.pdfIn PDF document text
    • https://selogum.files.wordpress.com/2020/11/demufegezi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/76860492700.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_off00007085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 4860 bytes
SHA-256: 0809e4bba46825544bea94896a86b0a52acc0b9273d33f0f108db900b81ac3b6
font_01_sfnt_off000080e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E9 10800 bytes
SHA-256: 17c898d8cee7822f074818848ad0a13e1494093dad33005381b6021dfcd6e1ef