Malicious PDF — malware analysis report

Static analysis result for SHA-256 6789700ac4794745…

MALICIOUS

PDF

47.4 KB Created: 2020-10-30 00:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 82d9b3b4add3a7ab7664ab5c55a54761 SHA-1: 6e3915b6dc109677ea05fa0514ff38ce6460de2c SHA-256: 6789700ac47947450b3932bf764c896f076bc87beda02a121d4ca502ec1d829a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/123?keyword=texting+simulator+codes+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5f9a7f1ecafad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f95cfea0a88a.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/jelimorabi_naropegopu_siraj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f9910f94f70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f880049c33dc.pdfIn PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/26390f85279b33f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/91cd8927-0ebb-4ac6-ba52-d1acf63905f5/lamujibixisuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191e69c7-b1fe-45fd-99f0-2f9280f87eda/capa_3_del_modelo_osi.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/vaboromafifuxafavunoremu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85d8df9-6ad9-4a7e-86ff-83f57110641f/23303339030.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/letavakatetutelixewawijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12127de7-ba33-4a7d-8264-7ad1cd0abe50/rekidojujokik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840c8484-a2ea-4aa1-8eaf-b4469319cbe4/vejuxofozivikow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a795814-8ca0-4bb6-b9bd-a8294fd50ac6/62902753201.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/balanced_scorecard_conceito.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/coweta_county_tax_assessor_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590cf2af-4076-49c9-980a-b6c7c63d3fdd/exploring_scrum_the_fundamentals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6905 5432 bytes
SHA-256: a579fd854d83e74bc804e78775cc2177af8178e9e390825dbd979d1264098844
font_01_sfnt_off00007b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B61 11960 bytes
SHA-256: 01314bef7491b16b583670621cb339ab932945ddf334a0e0a7878bcf6ea551bb
font_02_sfnt_off0000a2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2CE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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