Malicious PDF — malware analysis report

Static analysis result for SHA-256 baed6c8306c0838a…

MALICIOUS

PDF

46.1 KB Created: 2020-10-09 08:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 662a11a118dd8ec67da80beb764e0739 SHA-1: e7cea9984f900e5bb29e954ed6feb5c1cf9fbc2f SHA-256: baed6c8306c0838add6f45c344b932d5efffd369254d9faa97c74196f2602a26
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://ggtraff.ru/pify?keyword=what+do+muskrats+eat+in+the+wild In PDF document text
    • http://files.midtntrailcam.com/uploads/1/3/2/6/132681863/9517377.pdfIn PDF document text
    • http://tafexetum.karachendriks.com/uploads/1/3/0/8/130874391/1163014.pdfIn PDF document text
    • http://vilibivo.marcovarchetta.com/uploads/1/3/1/4/131454536/negowapitadur-naloviwet-xalerogija.pdfIn PDF document text
    • http://kodinumip.rutter-project.org/uploads/1/3/1/0/131070152/5173509.pdfIn PDF document text
    • http://lupulik.berrybrook.us/uploads/1/3/1/1/131163991/sojeniwisate-bemarekibixogig.pdfIn PDF document text
    • http://files.alphabgroup.com/uploads/1/3/0/7/130775126/36f24f26d5.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/1/0435/0876/0742/files/the_last_will_and_testament_of_rosalind_leigh_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3044/5731/files/mini_bass_boat_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3281/8076/files/di_p_li_sng_ni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/lisiliwaxijowodob.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_off00007707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7707 5232 bytes
SHA-256: 94d6ac336c36525f399233cf9955d99e728e98543aa0d52e049daf1c43fb27a8
font_01_sfnt_off000088bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BD 10240 bytes
SHA-256: 2b9a1f74cbbe331e98ed4aa1d700c7bbed3c6c375730b2901e12c3a8c9614fb6