Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4932bfdab83532…

MALICIOUS

PDF

77.2 KB Created: 2021-02-21 15:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 96ac4ea696d55d09e30de5e1269bb56b SHA-1: 9a99638aa73003483606153106d8825e115b6224 SHA-256: fc4932bfdab8353299eb0865fa48bcefb97620ab8088471814799f51b08113cc
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://bologen.ru/aws?utm_term=what+are+the+core+competencies+of+leadership PDF link annotation
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/fagifozedamukes_palar.pdfIn PDF document text
    • http://legiontry.online/naxiduwamopufedimetemo3ig1.pdfIn PDF document text
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/2fe6eb8681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5ffa7b3657c1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393751/normal_5fccd0fd991c5.pdfIn PDF document text
    • http://shortsomfj.space/31003664224chl7w.pdfIn PDF document text
    • http://bloomwithdeanna.com/acrobatic_gymnastics_classes_near_meld39r.pdfIn PDF document text
    • https://kanexunife.weebly.com/uploads/1/3/2/6/132681916/e46f8d.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/4340896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_6020b47046a1f.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/wezetufewamatik_rowukoreto.pdfIn PDF document text
    • http://sushibara.net/vasepapepabulq64z.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/bokelur/seninuwoguxesuso.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/jalabidizo.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/fowalasefakemoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/7535341769.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/dragon_age_inquisition_trials_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/light_novel_arifureta_sub_indo.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_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 5408 bytes
SHA-256: d23171973f864795c623d4d73f9743f68c7e1bd78c3c321e57e948f6efe6a3ed
font_01_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 10652 bytes
SHA-256: 39a683d4ad281ef5d5ed3fd42121a1b425d9e54415f81fa6934cf71b88f6dd34