Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63ea94f586442d4…

MALICIOUS

PDF

70.6 KB Created: 2020-11-17 16:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2564cfc171cb21f04d091fb60e0b02fc SHA-1: 971cd1f29a728efb676af95c71ecea906a0959c5 SHA-256: e63ea94f586442d49da814a7e7857c7f36170797b57fd7d9df24ba2b848475a9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=night+by+elie+wiesel+pdf+chapter+5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5fa5d0fecf11c.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/degirigobefawenetel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fa3b52cf1fb1.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/sexesir-korako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5f95a469daaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f9894d4dcb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fb2ebddd9546.pdfIn PDF document text
    • https://zuvagenujak.weebly.com/uploads/1/3/4/4/134454716/4322503.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/1791736.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/donake/16384279859.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/cuisinart_14_cup_coffee_maker_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/soveputefoxokolinedez.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/check_guideline_value_tamilnadu.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_off0000d709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD709 5844 bytes
SHA-256: 6362477b93ff53ee3465c59e16767e617b270b1b56b09df38b81ad430f10f2d6
font_01_sfnt_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 10268 bytes
SHA-256: 7605ed2829f638768cc0c65f7d9eddfb0c3e8846549076e3e932b6d66f3b6eee

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