Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5cf6d5047bec46…

MALICIOUS

PDF

42.9 KB Created: 2020-11-09 13:12:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: e03a6856172d9d808c3af11fa5979aaa SHA-1: c4e5843c60198afaae3b19e54fb4ad80fd3987df SHA-256: af5cf6d5047bec46df0f92aaaf31e52a4d1a86328f8dbc9209355430fa83ce9f
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://traffine.ru/123?keyword=jason+gideon+criminal+minds+wiki In PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/99edb22468a5e.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/zujuvuvuzevosonu.pdfIn PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/6412452.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/xadom.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006853.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006853.bin)
    • https://uploads.strikinglycdn.com/files/a1c99a2a-bb3e-4ed7-bb1d-232033972bb5/glock_22_titanium_guide_rod.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/les_examens_biochimiques.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/en_suffix_words_list.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/74047600061.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/73866811375.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/oil_filter_lookup.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/subway_surfers_modded_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/google_translate_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/avengers_theme_piano_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06876f54-c832-4f5f-8f71-d27774705a53/jowoworugobo.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 extracted file (font_00_sfnt_off00006853.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6853 5404 bytes
SHA-256: b077f6eb55e1014d268bfdfc8cbe17d32dc3efe2173c4bca6947fbf35451f420
font_01_sfnt_off00007ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 10440 bytes
SHA-256: a5aa8aa46b0c9fc9177d6344564335f2614b2f665bae08efaae07cb4c2e99f0d