Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5b206b5639aad1…

MALICIOUS

PDF

67.9 KB Created: 2020-10-06 22:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 203a4710d5e78b4814cdc07a7fda65b7 SHA-1: e6a246aaa6a0ab3f1bb3d0bf4f62502cdc8044b2 SHA-256: 2b5b206b5639aad1a14ccc61f7ab3db9d2c9fbf25ba0b913389a9b5dd27a7663
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://gettraff.ru/strik?keyword=progression+guide+ariesms In PDF document text
    • http://files.michaelcmarshall.com/uploads/1/3/1/4/131454090/mukodak.pdfIn PDF document text
    • http://files.infullbloomflorals.com/uploads/1/3/0/9/130969458/1479009.pdfIn PDF document text
    • http://files.mindhealthconnection.org/uploads/1/3/2/8/132814898/serirukifudesulimax.pdfIn PDF document text
    • http://ruxeg.libertylifeyoga.com/uploads/1/3/0/8/130873946/1693012a0.pdfIn PDF document text
    • http://files.juliaharnett.com/uploads/1/3/0/7/130775905/mugopavumosal_lafanela_fanilozowid.pdfIn PDF document text
    • http://sulukonu.mijunktiquescollection.com/uploads/1/3/0/7/130740178/d9883906b4.pdfIn PDF document text
    • http://files.onefutureatatime.com/uploads/1/3/0/9/130969115/3128333.pdfIn PDF document text
    • http://files.cea-alaska.org/uploads/1/3/1/4/131483108/lokatawufa_geromeje_dexexovowib_bojirut.pdfIn PDF document text
    • http://files.petroskiphysio.com/uploads/1/3/1/4/131437464/6185224.pdfIn PDF document text
    • http://busowaxe.aussiemobilepcdoctor.com/uploads/1/3/1/4/131453176/togetudolenudofuxuzu.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/1/0483/0783/0948/files/63806213359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/90945897500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/gebisaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5528/8998/files/tizidefisexinunogejen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7429/8271/files/nugukemulimetozakum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/marquis_de_sade_juliette_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6554/3329/files/peter_harvey_introduction_to_buddhism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2589/files/xofurulone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/google_sites_my_domain.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_off0000c784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC784 5116 bytes
SHA-256: 43a8b63361e03e4c23dd93aee0507e4a9c0452754e395e51cc85d624f9b35a68
font_01_sfnt_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 13444 bytes
SHA-256: d423fe19532dca36a25b56eb044f16454178b5b5b864f1aace9a0325e4703382

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