Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daaaa35615ef64d…

MALICIOUS

PDF

43.6 KB Created: 2020-11-08 15:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 01934a858096881078db372b78132811 SHA-1: 85c4fe66b9eb3fa22d70fa1b0fac9bef2e4bb30a SHA-256: 2daaaa35615ef64d58f76bdd3b82bd6d0d45f6285dac8508c2e10535fa45a52d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=akita+puppies+for+sale+mn PDF link annotation
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/08b32c73bca8d.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fa5f942de100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f91b40e91e76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5f9c7b72f27cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f9d33964a83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f890827714aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://worenod.files.wordpress.com/2020/11/pair_of_tickets.pdfIn PDF document text
    • https://zawexukaral.files.wordpress.com/2020/11/jikatepal.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/puzewilepoloxetewap.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/the_edge_of_seventeen_parent_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/worovarozebotusipe.pdfIn PDF document text
    • https://s3.amazonaws.com/gatiwaraluva/25611173305.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_off00006c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C98 5100 bytes
SHA-256: 4167b4cbac01e367fd365c5b4c3f2634f0dc39fc584fbac398d1583129220f71
font_01_sfnt_off00007de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 10480 bytes
SHA-256: 6249965e39557f8308fae961c7d2e8144944cf4dd49c9ca19d26e22e6b2bfca0