Malicious PDF — malware analysis report

Static analysis result for SHA-256 4425b4cb9b473266…

MALICIOUS

PDF

65.8 KB Created: 2021-02-26 19:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 28556121ebad4841775311901efbe23e SHA-1: 6bbfeaa9706da05562dd6d1901e9ad918509a0c2 SHA-256: 4425b4cb9b47326630fb7a2dec0cf6a4288ac3304438a815921c9818ed72d0cb
196 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
  • 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://nipisod.ru/wix?keyword=ionic+equation+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fce3d13c00cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5ff1e571de463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_602f3579e68e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443372/normal_5fe4efaf5f326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408706/normal_600154e52e3a2.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/YJhg6ij/prison_break_season_4_episode_24_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/cRhhjeo/boduludifolexufiboz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452607/normal_60092a51e1316.pdfIn PDF document text
    • https://laxaxaxiw.weebly.com/uploads/1/3/4/5/134528460/7426775.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/c90fc0c.pdfIn PDF document text
    • https://xixebume.weebly.com/uploads/1/3/0/9/130969831/4789091.pdfIn PDF document text
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/3081457.pdfIn PDF document text
    • https://jasesinokez.weebly.com/uploads/1/3/1/1/131164090/pixovebimamom.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/gjHghhh/descargar_actc_racing_pc.pdfIn PDF document text
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/xewegaxowuvatopiraz.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/kiremefegonar/contents_page_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/wumefizobenuponexolinefo.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/46761943980.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/68614831999.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC768 5076 bytes
SHA-256: 5e463e2a9e16446b87c9682d38200879e946da42f01c47aa2769f5b24c64acae
font_01_sfnt_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 9708 bytes
SHA-256: 27d7fc0ec7f7993ca6ed820767e34e1fb9838d44f4537ad8eb9d9f73ab8d9593

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