Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6e8c2e3e22d7e4…

MALICIOUS

PDF

41.3 KB Created: 2020-10-07 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b6f88fcf6d69439e17422f61440e2ca1 SHA-1: 26cfddbf47064deedb725cff82facd1a7994129d SHA-256: 5a6e8c2e3e22d7e49ad834685f804d09e538c5c560d11c03973924857a0e83d9
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=fragmentary+order+template In PDF document text
    • http://malulek.virginiabeachwaterpolo.com/uploads/1/3/0/7/130739284/dewigesirofad.pdfIn PDF document text
    • http://zugaw.audioallure.com/uploads/1/3/2/3/132302966/vuvexikuteji.pdfIn PDF document text
    • http://files.rdsconstructioninc.com/uploads/1/3/1/1/131163695/2af78a457e41fff.pdfIn PDF document text
    • http://gopuja.amenfordesign.com/uploads/1/3/0/8/130873922/futigu.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/1/0434/0465/6790/files/burley_honey_bee_jogger_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3243/7151/files/kafazumovosoguxox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0931/3438/files/40632017755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/google_sites_new_vs_classic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0470/9029/files/gonumamegelosamodonosagug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4268/8154/files/femoxomavamijixipivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1556/9060/files/jamejavoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/3133/5590/files/87244220946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d74ea3-7208-4ecd-aa52-1dc83a7d7add/99698046818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9317a565-1c4b-44ef-b554-0839eb50381b/60272272353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68634009-d22d-44c0-8967-fd0cfa31fcf9/vomoliridajoloxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037a24d6-0f0e-45d7-be2c-0f68fa15cf99/xudijemila.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_off00006422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 5160 bytes
SHA-256: 22319035f3038e43e7b1829cc3370a83dad9ac09e9fad57d871e28a6111e37e1
font_01_sfnt_off000075a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 10220 bytes
SHA-256: 3c6e7c43f16db220f03214e3cdac8772b73e9da0f4a63e9807becac295ac1ab6

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