Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba49028c2536d430…

MALICIOUS

PDF

48.9 KB Created: 2020-10-01 01:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8257bad17a94fc3ec0e30ad872f9cc2d SHA-1: a682af140761c8a97f502dc8aa3295e076c26cdd SHA-256: ba49028c2536d430e147d9ee320e9c8f3bedbda1ded93edc78bd318f202b4514
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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/strik?keyword=ley+1228+de+2008+pdf In PDF document text
    • http://files.marvinsnider.com/uploads/1/3/0/7/130739174/fatewor-naxeloke-kaguv.pdfIn PDF document text
    • http://jadal.smokeyfiresidecreations.com/uploads/1/3/0/7/130738914/vorirovibu.pdfIn PDF document text
    • http://files.clubdanger.com/uploads/1/3/1/4/131406222/xufuleva_lubagatalozam_xagufejuloto_kuzezabizavupow.pdfIn PDF document text
    • https://site-1037856.mozfiles.com/files/1037856/dukelut.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/30399531337.pdfIn PDF document text
    • https://site-1039283.mozfiles.com/files/1039283/limibitukup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e6ef55-c3b1-4f3a-9632-d121f4ef6e85/9963591339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b088ad9-b676-4714-bc5b-1b4cade9aabf/18417216569.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_off000080d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D0 5084 bytes
SHA-256: 7efc6a1e26fb31f1ce9b05ac67052510846bc50c600883ccfc27c00ee308e5bf
font_01_sfnt_off00009253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9253 10828 bytes
SHA-256: aaee7d947a2cd1f4da10e993918706b59b42551d3ca9685b71d93d10d5ca9fa9