Malicious PDF — malware analysis report

Static analysis result for SHA-256 217f54c08fcce354…

MALICIOUS

PDF

34.7 KB Created: 2020-11-02 23:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9fe3567bc84ebb9543bf649658e50efd SHA-1: cb8c877f83805994d751fb810b89335e7284f025 SHA-256: 217f54c08fcce3541f7a359b0f0db97f0989b5e19977793aa6f0f71bc229429c
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://cctraff.ru/strik?keyword=bassini+repair+steps In PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/7a1327559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5f9f9be97c779.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/029bb958c0c72ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5f9ace8c10f7c.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/6281772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f9159ebbcee6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gofiguj/55727401049.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/90356442756.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/zevarikegusavakobiduku.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/epic_boss_fighter.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/mopar_nationals_2019_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/array_1_codingbat_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/learning_german_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxibipan/90700587981.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_off000049b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B0 4832 bytes
SHA-256: 6c9fe43becdbc4bb06b06d5e1ca14a687098be3eb4fa821827f42e6a6b4b1aa1
font_01_sfnt_off00005a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2A 10816 bytes
SHA-256: 47513fbb68e484cbf32cfedf6bbf3e077ea3d3ad0efc1c9be4bb649a0ff8ec2b