Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a90f095d41e0cba…

MALICIOUS

PDF

77.0 KB Created: 2021-02-01 01:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f58144f7b472d4bb0fd59fa40b86d9ca SHA-1: 815ee6dcbf0bec16a82694c7c90bd73df5b33433 SHA-256: 3a90f095d41e0cbaf9323aae715902c7d443314a03da2252ecdb92f7d820c955
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=gti+manual+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373797/normal_5fdd058681166.pdfIn PDF document text
    • http://mercelus.xyz/podudirotovuvidogesenijo1pa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5febb294c193b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5fe593bc0eb42.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/iblheUZ/83262311670.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/bjehdBA/89680936180.pdfIn PDF document text
    • http://milanbeachs.space/koxususalerufulagateloszjo20.pdfIn PDF document text
    • http://winoraama.fun/86483117321tyv1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_600d41a55bc57.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/hcOj9ib/fill_color_in_excel_shortcut_key.pdfIn PDF document text
    • http://abzac.me/86424299892viaoj.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/hgie6gg/super_inn_suites_milledgeville_ga_31061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5ff4013cb7063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453720/normal_5ff8094798fd4.pdfIn PDF document text
    • https://vajubepodeno.weebly.com/uploads/1/3/0/7/130776779/bezaju_xanave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 4836 bytes
SHA-256: 6fbdc6b81a5b20c33285e4398a1430d3da16ddb52238f0ef7980cbcfe2e89cbc
font_01_sfnt_off000100f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 11332 bytes
SHA-256: 26ba8a5d136f9efbefed9d767660b527bfdf072e03727f1b32b1edd025d52e8e