Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb023a20932f5f00…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 15:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 60df9ad052c34f9424af8a559b77611b SHA-1: dd2dd7e28f7f99ad57284e6d96439ef48054e50f SHA-256: eb023a20932f5f00106b2fbb87dbe28c2e70640b31a3a2e7215187cc6f561e89
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/award?keyword=who+was+the+first+martyr+to+be+killed In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5ffb435a9e0ed.pdfIn PDF document text
    • https://pijetupuz.weebly.com/uploads/1/3/4/3/134351396/gonow-siwogoxepipale-mujanix.pdfIn PDF document text
    • https://verevivomilob.weebly.com/uploads/1/3/0/7/130738769/narifikerovi-buzaniduxin-wojevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_600ea3648ed08.pdfIn PDF document text
    • http://meetporte.xyz/what_is_the_order_of_the_marvel_movies1teve.pdfIn PDF document text
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/kuzifosakube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_60064d1b49516.pdfIn PDF document text
    • http://firstreadersclub.com/hack_para_need_for_speed_no_limits_202076m6k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5fce47f0ea050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_600d633cf3108.pdfIn PDF document text
    • http://auto-fishing-rods1.club/how_to_share_a_post_from_someone_else_on_facebook43g3b.pdfIn PDF document text
    • https://vofesoxofibebup.weebly.com/uploads/1/3/4/9/134900141/guxoma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404730/normal_5fe51873c070f.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/ratixifo/broderie_diamant_grand_format.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_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 5560 bytes
SHA-256: 4d8b501c3eea73916e0d0f166c5303b17ef207276e6a339fbd30b6393552b7ef
font_01_sfnt_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 10156 bytes
SHA-256: e58c041cc3e3e1213386e38f97f1652f0e207aa70af33e94789777b1554b00bc

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