Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb29431069f2bf22…

MALICIOUS

PDF

43.7 KB Created: 2020-10-02 05:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cc5cc09939b8c216f29c75b7f8a2c70e SHA-1: 365a7cef632c8e7017ec5607bf23f3da1b0f0bce SHA-256: eb29431069f2bf22596e07b67bc2e9fabb6f675320dd6edb8170fc382239fe33
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://cctraff.ru/strik?keyword=como+hacer+un+alambique+casero+para+destilar+alcohol+pdf In PDF document text
    • http://files.bachmanbackstagebling.com/uploads/1/3/2/3/132303245/zofinunoxorilasalik.pdfIn PDF document text
    • http://files.casinographics.com/uploads/1/3/2/7/132740606/zetuvomu_bedadibu_selapeli.pdfIn PDF document text
    • http://remitajig.abhdi.com/uploads/1/3/1/4/131407876/tavofamezodugozedu.pdfIn PDF document text
    • http://gunape.camandmica.com/uploads/1/3/1/6/131637830/tikoligerelanenup.pdfIn PDF document text
    • http://fewike.seaboarddevelopmentcompany.com/uploads/1/3/1/4/131406686/ponuponejuge-zasekiwenijo-vojabixun-gejizageluxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/49854471421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/hill_climb_racing_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6068/5719/files/kejalinolejesosoxunumabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ea9176-7f1e-4c1e-8931-b4e03c4180b1/66891651452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfe7632-451b-41e3-948d-f487067b7e30/84789650163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908b8510-5d09-4115-8cf1-746d5aa5acdb/fofilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/map_of_ancient_china_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8774/1599/files/apocalypse_of_zephaniah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/kumesanajunosokotus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7373/5330/files/cell_transport_answer_key_amoeba_sisters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/8478/5311/files/chemistry_behavior_of_gases_worksheet_answers.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_off0000686c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686C 5564 bytes
SHA-256: 83588a365807cdabeeefa2bf466813078d7335dfcb808044f5564e3763af21a9
font_01_sfnt_off00007b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B19 11032 bytes
SHA-256: 5051293602d362f825d8467507f1495e8e37da561cca008c5e7968577f3341d1

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