Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce05c37cb4c03fc…

MALICIOUS

PDF

71.3 KB Created: 2021-02-05 15:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fe9f19ef97afe837468b98f26c0675eb SHA-1: a11948d93b31a855be977618bbaa624175d4bbc3 SHA-256: 9ce05c37cb4c03fc1c321fdcad9f46cec85a224fd577570f08b14b7e998f3d28
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://jacksth.ru/wb?keyword=cursos%20de%20ingles%20basico%20pdf%20gratis PDF link annotation
    • http://private-channel.site/20958647002yfdh9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5fdca75a9320c.pdfIn PDF document text
    • https://gutirupivib.weebly.com/uploads/1/3/4/7/134768574/885ba97.pdfIn PDF document text
    • https://mapijilut.weebly.com/uploads/1/3/0/8/130873952/lemavuzo-wujanutow-kefigeviko.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/6f2a75ba.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/1518486.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/8512040.pdfIn PDF document text
    • https://dekukosozo.weebly.com/uploads/1/3/1/0/131070054/57af6c264fb0.pdfIn PDF document text
    • https://milarenu.weebly.com/uploads/1/3/2/8/132814898/1643632.pdfIn PDF document text
    • http://3gusevshop.space/30010593990jsdmq.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/b5286f6b95.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/a9bbd14fa50.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/levumoduf/tumor_benigno_e_maligno.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/54442296484.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/jasutalutim.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/58948837030.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/linnworks_ebay_listing_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/tigikeginajetafadumukexut.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_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 5368 bytes
SHA-256: 5deb85201ade23f050a7cdab2ddf561cabab276b914e1d4bee78cb868896d8b3
font_01_sfnt_off0000e884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE884 11712 bytes
SHA-256: 957613c7aba2b0a821459b718892b8625240ae3bdcdb027745ac784b5d179f17

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