Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fe65cc4b8fd6dd…

MALICIOUS

PDF

46.5 KB Created: 2020-10-07 09:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dd3e4659f3b8abe52a6c8b5afd83c492 SHA-1: ea1500494ec57d4260c759171cf5da363fc50e46 SHA-256: d8fe65cc4b8fd6dd72ceff9ff19d80f15a0435856ab38b1d8d88b8c79aef9042
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=dikkat+toplama+becerisini+geli%25C5%259Ftiric In PDF document text
    • http://files.superiorsupportsrvs.com/uploads/1/3/0/8/130813325/a1763cfee4.pdfIn PDF document text
    • http://tanowu.oceanstonelandscapes.com/uploads/1/3/1/4/131409090/wifijarunem-betekabafi-soxig-nexedisusitika.pdfIn PDF document text
    • http://vulub.pleis.us/uploads/1/3/1/4/131438304/guvozamuli_jupamusuzese_puwexudijarew_gozikajarox.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/1/0492/3742/6342/files/wiripafaleberozonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/a_practical_guide_to_usability_testing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3565/8906/files/hydro_mousse_liquid_lawn_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/sibuxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7196/2788/files/world_cat_basketball_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/dadodotuzubulaxariwifojik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4330/9726/files/50933937729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7243/2544/files/convencion_americana_de_los_derechos_humanos_pacto_san_jose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376ae905-3d4b-485a-92cb-de0ed296c03e/51288605981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc00e68f-c927-4849-af8b-e12a6d496c3d/35268777603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d5a786-c861-4d3a-9065-bb1506e9bab0/vuninulegorapere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abc543b-4105-4b50-842b-3fbbc6bd1671/lutusugakizuloxoxebezis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708d6033-6574-4b9f-944f-226ac3bb576b/35928210426.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_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 5704 bytes
SHA-256: a9d5c4aef66de456da5a72d92b3ec9150b8480a7e994982ed9e6234736ec965e
font_01_sfnt_off000084e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E8 12268 bytes
SHA-256: 3efe6fd849148d175a7d99a44e1bb7d9f7c3e392c656a883c072bb53ce5d3a14

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