Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6850b96ebc8b828…

MALICIOUS

PDF

40.3 KB Created: 2020-10-05 22:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f2792da24e69a041d34de30113c2d507 SHA-1: 7250d508688e48568e1c97d4d5b66e21a4d57b9b SHA-256: a6850b96ebc8b8284fdb5c36fe0ee9cc3f1ffd249ff30945644ce3aaea5b47a8
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.com/pify?keyword=carson+city+crystal+high+school In PDF document text
    • http://puwuzex.ashleyelainecooper.com/uploads/1/3/0/9/130969130/26eba.pdfIn PDF document text
    • http://files.feedingfamiliesministry.org/uploads/1/3/2/7/132710797/969526.pdfIn PDF document text
    • http://mogow.angelaadockter.com/uploads/1/3/2/6/132680835/844e34d74cb.pdfIn PDF document text
    • http://files.thecraptrader.co.uk/uploads/1/3/1/4/131408103/lirid.pdfIn PDF document text
    • http://xetuxa.animalprotection-eg.org/uploads/1/3/1/4/131453870/28fc27f99be605.pdfIn PDF document text
    • http://files.rysaa.com/uploads/1/3/1/4/131437484/jefafap.pdfIn PDF document text
    • http://files.lg-yoga.com/uploads/1/3/1/8/131856188/zabumun_fuduguke.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/1/0483/7906/8567/files/jufubupelifekabanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/omegle_not_working_camera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/modilewekokojut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7288/1575/files/pathfinder_2e_buy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8192/7323/files/solon_football_iowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4236/8409/files/stream_rivers_church.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_off0000604c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 5068 bytes
SHA-256: 6c49abbbee9a67d71325e2469a442b8b8dd9864fcb63e2c0827527cc735c0402
font_01_sfnt_off00007182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 10420 bytes
SHA-256: c802f4ee9336bb7a6da1c4f55f5d778484a87bf6d6b5fc6a49bc3ace453eed37