Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82b7db86b6159cf…

MALICIOUS

PDF

70.2 KB Created: 2021-03-03 14:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3f80e2b5d46651e40b289d794fd45909 SHA-1: e52151a4c34d01ddb3ec80e8c20c0d98a5a2a88b SHA-256: b82b7db86b6159cfc515477a14a2869a38ea382735bdb3863ab3d2febfc8f988
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/award?keyword=piano+adventures+primer+level+gold+star+performance PDF link annotation
    • https://lapedegino.weebly.com/uploads/1/3/4/6/134689006/betugutipigejo-rinuda.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/fafowusujozax_boxagazifavaxir_bebonegilodeb_nakuwupen.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/7937718.pdfIn PDF document text
    • https://xigukiburid.weebly.com/uploads/1/3/2/7/132741693/gosuruzufurusilad.pdfIn PDF document text
    • http://xarusogu.22web.org/bachelor_in_paradise_2019_australia_tv_guide.pdfIn PDF document text
    • https://baxolelal.weebly.com/uploads/1/3/4/6/134625426/2776739.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/7f0d0d51036d2c3.pdfIn PDF document text
    • https://vuzitiruf.weebly.com/uploads/1/3/2/8/132814505/retow-sikosa-nuwob-sulaxataxoge.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/kesawojoguwatukozon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuxuxal.epizy.com/35082795952.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/nudokusanibovamimabij.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/tonudenesobunamoze.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/besujagasimepijop.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/cbse_biology_project_on_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/buyer_s_agent_agreement_form_qld.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_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 5536 bytes
SHA-256: 0fe6c69105ff9c90b003ce694f9ff38cc22b33669c7d0bd4c326bc81face5960
font_01_sfnt_off0000e7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C7 10536 bytes
SHA-256: 6b360d822d90deeb1ac621ff598620f9065e69468d548b24fbafe4e8dc69f48b

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