Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bc70cdccc09fc9…

MALICIOUS

PDF

43.4 KB Created: 2020-09-12 08:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f64773bacdacafc6dacaf606b57a8253 SHA-1: d173939500d735f630821b8eee7b70f4512d85ce SHA-256: 43bc70cdccc09fc9206782e87bee0fbc6f438319d620f0e8a9f7dca624c491ce
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.club/pify?keyword=bmw+m340i+touring+m+performance In PDF document text
    • http://migozedom.louisefutchertherapy.co.uk/uploads/1/3/0/8/130814623/lojok_pifixugipitiki_jafunabaronofiv.pdfIn PDF document text
    • http://segilak.oegallery.nz/uploads/1/3/0/8/130874063/3864854.pdfIn PDF document text
    • http://files.bronzedoklahoma.com/uploads/1/3/2/6/132681409/belasoj-vabuvakedaj-viwesev-xikexabetewe.pdfIn PDF document text
    • http://files.maths180.com/uploads/1/3/2/7/132741149/cb1817c769c0049.pdfIn PDF document text
    • http://files.studiosfinearts.com/uploads/1/3/2/6/132681204/zizaxovojenanamiliz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/dcc11b_e5fea93928da4602b3a35bcb1b38448a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c162b3_fade0d292b7c494e9dedb3ba43827a07.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4479ed_7ecc846086184fe496f5a1f5c14eda1e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_79e5621b3b93465c933d78aa27bd31cc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/juego_de_tronos_online_latino_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/zerabo.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_off00006b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9E 5660 bytes
SHA-256: 911c15021287bb95dae21330dcdd0205a9e211d47db1cdf7545daff52663d4a0
font_01_sfnt_off00007ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF6 9912 bytes
SHA-256: 3b6176e30e6fc96566cfcaac5b743703da75b61a0cc87997b5f4176562159d4d